Which type of reaction occurs in the sun to release light and heat?.
Answers
The type of reaction that occurs in the sun to release light and heat is nuclear fusion.
Nuclear fusion is the type of reaction that occurs in the sun to release light and heat. It is the process in which two atomic nuclei combine to form a heavier nucleus and release energy. In the sun, the process involves the fusion of hydrogen nuclei (protons) to form helium. This reaction occurs at a temperature of about 15 million degrees Celsius, which is hot enough to overcome the repulsion between positively charged atomic nuclei.
As a result of the reaction, vast amounts of energy are released in the form of light and heat. This energy is what powers the sun and provides heat and light for life on Earth. Nuclear fusion is also being studied as a potential source of energy for human use, as it has the potential to produce vast amounts of energy without generating harmful waste products like those produced by nuclear fission.
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Related Questions
Which actions would increase the rate at which salt dissolves in water? Stir the water. Crush the salt. Use less water. Heat the water. Cool the salt.
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Answer:
Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.
1
Type the correct answer in the box. Spell all words correctly.
What are deposits brought by flowing water known.
Answers
Determine the equivalent resultant couple moment about point O.
Enter the x, y, and z components of the moment separated by commas using three significant figures.
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The equivalent resultant couple moment about point O is -1300i+525j +1375k.
Net force definition.The total of all the forces acting on an object is known as the net force. Mass can be propelled forward by net force. A body is subject to some other force whether it is at rest or in motion. When there are numerous forces acting on a system, the net force is used.
F1 = -300k
F2 = -300 k
F3= 200j +450j -350k
r1 = 2j
r2 = 1.5 i +3.5j
r3 = 1.5i +2j
Net force F = F1+F2+ F3 = -200i + 650j -650k
Equivalent resultant force calculation using vector sum.
Step 2/2
Equivalent moment M = r₁ x F₁ + 2 x F₂ + r3 x F3
M = [(2j))x (-300 k) + (1.5 i +3.5j)x(200j) +(.5i +2j) x( -200i +450j-350k)]
M= (-600i) +(300k) +(-700i +525 j+ 1075k)
M = -1300i +525j +1375 k
Net force F = -200i + 650 j-650 k
Equivalent moment M
M = -1300i +525 j +1375 k
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How many atoms does NH4Br have
Answers
Answer:
6
Explanation:
bromine has 1, hydrogen has 4 and nitrogen has 1 therefore equaling 6
The number of atoms in NH₄Br is six.
What is an atom?An atom is a particle of matter that uniquely defines a chemical element. An atom consists of a central nucleus that is surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.
Atoms are the basic building blocks of matter. Anything that takes up space and anything with mass is made up of atoms.
In the given formula, there is one N atom, four H atoms and one Br atom making a total of six atoms.
Therefore, the number of atoms in NH₄Br is six.
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What is the electrochemistry underlying the electrical current in a neuron as it is stimulated? Potassium channels closing to keep potassium inside the cell Potassium channels opening to allow potassium to enter the cell Sodium channels opening to allow sodium to exit the cell Sodium channels opening to allow sodium to enter the cell Question 2 The MOST FUNDAMENTAL variable that can probably explain the evolution of bigger brains is related to whether the animal is a dietary generalist or specialist the overall ecological complexity that the animal deals with whether the animal is solitary or social whether the animal is monogamous or polygynous
Answers
The electrochemistry underlying the electrical current in a neuron as it is stimulated involves sodium channels opening to allow sodium to enter the cell.
2. The most fundamental variable that can likely explain the evolution of bigger brains is the overall ecological complexity that the animal deals with.
During neuron stimulation, an action potential is generated. This process involves the depolarization of the neuron's membrane, which is achieved by the influx of positively charged ions, primarily sodium ions (Na+). When a neuron is stimulated, voltage-gated sodium channels in the cell membrane open, allowing sodium ions to rapidly enter the cell. This influx of positive charge depolarizes the membrane, creating an electrical current that propagates along the neuron.
Regarding the second question, the most fundamental variable that can likely explain the evolution of bigger brains is the overall ecological complexity that the animal deals with. Animals that inhabit complex and challenging environments often require enhanced cognitive abilities to navigate and respond to their surroundings effectively. The ecological complexity, such as varied food sources, social interactions, and environmental stimuli, can drive the evolutionary pressure for larger brain size and increased cognitive capacity. While factors like diet, sociality, and mating strategies may play a role, the overall ecological complexity is considered a crucial determinant of brain evolution.
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KINDLY PARAPHRASE THE FOLLOWING PARAGRAPHS:
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Growth in Distribution Spaces
An essential part of the e-commerce business is its supply chain. Figuring out the logistics for packaging and shipping goods to customers includes warehousing, and that’s where commercial real estate comes into play. As e-commerce has grown, we have seen significant growth in the leasing and sale of distribution centers and warehouse spaces.
E-commerce giants look for spaces near large cities like Houston while still having enough space for large buildings. There is a lot of potential and growth in the Houston suburbs such as Katy, Brookshire & Waller. We are seeing more distribution centers popping up in these areas.
Smaller Retail Spaces
As retail has shifted to online, we have seen businesses struggling to keep physical spaces open over the past few years. While e-commerce is booming, some brick-and-mortar spaces are having to close or downsize.
There are certain markets, like groceries, that will always require a physical location, but there is a trend for smaller retail spaces across the market. Smaller spaces mean less inventory in-store, and this consequently encourages a combination of online and in-store shopping. Hybrid shopping especially increased in popularity during the Covid-19 lockdown.
Merging online shopping with curbside or in-store pick-up offered that element of convenience and a safe way to shop during the pandemic, and even as restrictions ease, people will still seek the ease of this approach. However, even though convenience is what mainly drives e-commerce, we don’t expect to see in-store experiences disappear altogether.
Increased Technology in Retail
Since many prefer shopping online, working to translate the benefits of technology to physical spaces has been important in keeping up with trends. Integrating technology into retail spaces will be essential for future leasing and selling opportunities in the market. Implementing tools such as apps can create unique and convenient shopping experiences and can help businesses gather data that is essential for tracking traffic and learning more about the customer.
These tools can also help drive customers to the retail location with special offers or in-store pickup options. Large lifestyle shopping centers have shown to be among the most proactive in blending technology with consumer experiences.
Overall, e-commerce has a major impact on the commercial real estate business, from the industrial real estate benefit from its growth to seeing space buying and leasing becoming a smaller part of retail operations. In 2020 alone, e-commerce accounted for 14 percent of all sales, but it is inevitable that e-commerce will continue to grow as it has for the last decade. Commercial real estate is a reflection of society and its habits and we will continue to see it mirrored as changes in technology and retail emerge.
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Answers
The impact of e-commerce on commercial real estate is significant. E-commerce sales have grown steadily, accounting for a considerable portion of overall sales.
The growth of e-commerce has fueled the demand for distribution spaces, specifically distribution centers and warehouses, which play a crucial role in the supply chain and logistics of packaging and shipping goods to customers. These spaces are sought after by e-commerce giants, who prefer locations near large cities while still providing ample room for large buildings. Suburban areas, such as Katy, Brookshire, and Waller near Houston, are experiencing significant growth in the establishment of distribution centers.
On the other hand, the rise of online shopping has posed challenges for brick-and-mortar retailers. Many physical retail spaces have struggled to remain open or have had to downsize. As a result, there is a trend towards smaller retail spaces, which require less inventory in-store. This trend encourages a combination of online and in-store shopping, known as hybrid shopping. The Covid-19 pandemic further accelerated this trend as consumers sought the convenience and safety of online shopping with options like curbside or in-store pick-up. Even as restrictions ease, this approach is expected to remain popular.
To adapt to the changing retail landscape, integrating technology into physical retail spaces has become crucial. Technology tools, such as mobile apps, can enhance the shopping experience, offer special promotions, and provide valuable data on customer behavior. Retailers, especially large lifestyle shopping centers, have been proactive in blending technology with consumer experiences to stay relevant and attract customers.
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Many watches are powered by small, flat batteries called button cells. One common type of button cell contains the metal zinc. When zinc in the battery combines with oxygen in the air, zinc oxide forms. This process generates the electricity that powers the watch. is this a product or reactant
Answers
The electricity generated that powers the watch by zinc in the battery combines with oxygen in the air, zinc oxide forms reaction is a product.
Zinc-air batteryIn zinc -air battery oxidation of zinc to zinc oxide in presence of oxygen from air takes place. These batteries are cost-effective and contain more density of energy as compared to others. When compared with lithium batteries these are with more capacity, environmental safe, cost-effective and easy to produce these are widely used. Metal-air batteries fueled by the oxidation of zinc with oxygen from the air include zinc-air batteries (non-rechargeable) and zinc-air fuel cells (mechanically rechargeable). These batteries are produced at comparatively low costs and have great energy densities.Effective anode materials must be developed for next-generation lithium-ion batteries (LIBs). Due to a number of intriguing characteristics, including its high theoretical capacity, simplicity in synthesis, environmental friendliness, and low cost, zinc oxide (ZnO) has been regarded as a useful material.In addition, compared to the majority of primary batteries, zinc-air batteries offer a high volumetric energy density. Such batteries have a number of drawbacks, including a reliance on ambient conditions, a propensity to dry up when exposed to air, flooding potential, a finite output, and a brief active life.For more information on zinc batteries kindly visit to
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How many grams of sodium hydroxide are required to prepare a 200 ml solution of a 10% (weight per volume) solution? (Atomic weights: Na = 23; 0 = 16; H = 1)
Answers
Given that we want to prepare a 10% solution of sodium hydroxide in 200 mL, we need to calculate the mass of sodium hydroxide required to make this solution.
We can use the following formula to calculate the mass of solute required to make a given volume and concentration of solution:
mass of solute = volume of solution x concentration of solution x density of soluteFirst, let's calculate the density of sodium hydroxide.The density of solid NaOH is 2.13 g/mL. So, the density of sodium hydroxide solution is:
Density = 2.13 g/mLNow, let's substitute the given values into the formula to calculate the mass of sodium hydroxide required:mass of solute = 200 mL x 0.10 x 2.13 g/mL= 4.26 gTherefore, 4.26 grams of sodium hydroxide are required to prepare a 200 mL solution of a 10% (weight per volume) solution.About Sodium hydroxideSodium hydroxide, also known as lye and caustic soda or caustic soda, is an inorganic compound with the chemical formula NaOH. This compound is an ionic compound in the form of a white solid composed of the sodium cation Na⁺ and the hydroxide anion OH⁻. Sodium hydroxide is a building block that can also be found in detergents and oil stain removers. We use it to make products clean better by influencing the formula molecules, so they work better together.
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How many moles are in 1. 82 x 10^20 atoms of silver?
Answers
1.82x10^20 atom Ag x mole
———————————————- =
1 6.023x10^23 atom
= 0.000302 moles
isopropyl alcohol is mixed with water to produce a 37.0% (v/v) alcohol solution. how many milliliters of each component are present in 815 ml of this solution? assume that volumes are additive.
Answers
815 mL of this solution contains 570.5 mL of water and 244.5 mL of alcohol, respectively.
We are given a solution of alcohol that is 30.0% (v/v). This indicates that there is 30.0 mL of alcohol in 100 mL of solution.
The volume of alcohol In the 815 mL solution must now be calculated.
As 30.0 mL of alcohol is present in 100 mL of solution.
Therefore, a solution of 815 mL \(\frac{815}{100} *30.0 = 244.5mL\) of alcohol.
Alcohol, therefore, has a capacity of 244.5 mL.
We must now determine the water’s volume.
\(The volume of water = Volume of the solution - Volume of alcohol\)
Water volume = 815 mL – 244.5 mL
Water volume = 570.5 mL
As a result, the water’s volume is 570.5 mL.
Thus, there are 570.5 mL of water and 244.5 mL of alcohol, respectively, in 815 mL of this solution.
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when ethyl chloride, ch3ch2cl, is dissolved in 1.0 m naoh, it is converted into ethanol, ch3ch2oh, by the reaction: ch3ch2cl oh– ch3ch2oh cl– at 25°c the reaction is first order in ch3ch2cl, and the rate constant is 4.3 × 10–3 s–1. if the ea
Answers
When ethyl chloride (CH3CH2Cl) is dissolved in 1.0 M NaOH, it undergoes a reaction to form ethanol (CH3CH2OH) and chloride ions (Cl-). This reaction occurs at 25°C and follows a first-order rate law with a rate constant of 4.3 × 10^-3 s^-1.
The activation energy (EA) is not provided in the question, so it is unclear what information you are looking for. However, I can provide some general information about activation energy.
Activation energy is the minimum amount of energy required for a chemical reaction to occur. It determines the rate at which the reaction proceeds. Higher activation energy means a slower reaction rate, while lower activation energy leads to a faster reaction rate.
In this specific reaction, the rate constant and temperature are given, but the activation energy is missing. To determine the activation energy, you would need additional information, such as the Arrhenius equation, which relates the rate constant, activation energy, and temperature.
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When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.a) What do you think substance X is likely to be?b) Name the substance which the yellow solid consists of.c) Which characteristics of chemical reactions is illustrated by this example?d) Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactions and products involved in the chemical equation.
Answers
a) The substance X is likely to be lead nitrate (Pb(NO₃)₂)
b) substance which the yellow solid consists of lead iodide (PbI₂).
c) The characteristic of chemical reactions that is illustrated by this example is the formation of a precipitate.
d) The balanced chemical equation for the reaction that takes place is:
Pb(NO₃)₂ (aq) + 2KI (aq) → PbI₂ (s) + 2KNO₃ (aq)
The material X is probably lead nitrate(Pb(NO₃)₂) since it interacts with potassium iodide (KI) to produce lead iodide (PbI₂), a yellow solid. Lead iodide is the yellow solid that separates from the solution (PbI₂).
The production of a precipitate is a property of chemical processes that is demonstrated by this example. A precipitate is a solid that develops during a chemical reaction from a solution. The reaction's balanced chemical equation is as follows:
Pb(NO₃)₂ (aq) + 2KI (aq) → PbI₂ (s) + 2KNO₃ (aq)
In this equation, the physical states of the reactants and products are indicated in parentheses. The aqueous solutions of lead nitrate and potassium iodide are indicated by (aq), and the solid lead iodide is indicated by (s). The aqueous solution of potassium nitrate is also indicated by (aq).
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to make up 1 l of a 0.5 m solution of edta starting with the free acid, approximately how much 10 m naoh will have to be added to adjust the ph to 7.0? do you expect this solution to have a ph-buffering capacity? the pkas of the four acetic acid groups on edta are 2.0, 2.67, 6.16 and 10.26.
Answers
To make up 1 L of a 0.5 M solution of EDTA starting with the free acid, the pH must be adjusted to 7.0. EDTA is a weak acid with a pKa of 2.0, 2.67, 6.16, and 10.26 for the four acetic acid groups.
At a pH of 7.0, EDTA will exist in a buffered state, meaning that it will be partially protonated and partially deprotonated.
To adjust the pH of the EDTA solution to 7.0, an alkali solution such as 10 M NaOH must be added. The amount of NaOH required can be calculated using the Henderson-Hasselbalch equation:
pH = pK a + log([base]/[acid])
where [base] is the concentration of the deprotonated form of EDTA and [acid] is the concentration of the protonated form of EDTA.
At a pH of 7.0, the acid-base equilibrium of EDTA will be:
[EDTA-] = [HEDTA]
At this pH, the buffer capacity is high. Since the pKa of EDTA is close to the desired pH, the buffer will resist changes in pH caused by added acids or bases.
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Balancing acid average equationa. PbO2 + Mn2+ -> Pb2+ + Mn04-
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1) Balance the chemical equation.
\(PbO_2+Mn^{2+}\rightarrow Pb^{2+}+MnO^-_4_{}\)Step 1: Assign oxidation numbers
PbO2: Pb (+4) and O (-2)
Mn2+: Mn (+2)
Pb2+: Pb (+2)
MnO4-: Mn (+7) and O (-2)
Step 2: Figure out what's being reduced and what's being oxidized.
Mn has been oxidized. It changed from (+2) to (+7)
Pb has been reduced. It changed from (+4) to (+2)
Step 3: Write half-reaction
Oxidation half-reaction
\(Mn^{2+}\rightarrow MnO^-_4\)Reduction half-reaction
\(PbO_2\rightarrow Pb^{2+}_{}\)Step 4: Balance all elements EXCEPT for hydrogen and oxygen
Oxidation half-reaction
\(Mn^{2+}\rightarrow MnO^-_4\)Reduction half-reaction
\(PbO_2\rightarrow Pb^{2+}_{}\)Step 5: Balance oxygens. We do so by adding water molecules to the half-reactions as needed.
Oxidation half-reaction
\(Mn^{2+}+4H_2O\rightarrow MnO^-_4\)Reduction half-reaction
\(PbO_2\rightarrow Pb^{2+}_{}+2H_2O\)Step 6: Balance hydrogens. We do so by adding protons (H+) to the half-reactions as needed.
Oxidation half-reaction
\(Mn^{2+}+4H_2O\rightarrow MnO^-_4+8H^+\)Reduction half-reaction
\(PbO_2+4H^+\rightarrow Pb^{2+}_{}+2H_2O\)Step 7: Balance charges. We do so by adding electrons
Oxidation half-reaction
\(Mn^{2+}+4H_2O\rightarrow MnO^-_4+8H^++5e^-\)Reduction half-reaction
\(PbO_2+4H^++2e^-\rightarrow Pb^{2+}_{}+2H_2O\)Step 8: Multiply half-reactions to make the number of electrons equal.
Oxidation half-reaction.
\(2\cdot(Mn^{2+}+4H_2O\rightarrow MnO^-_4+8H^++5e^-)\)New oxidation half-reaction.
\(2Mn^{2+}+8H_2O\rightarrow2MnO^-_4+16H^++10e^-\)Reduction half-reaction
\(5\cdot(PbO_2+4H^++2e^-\rightarrow Pb^{2+}_{}+2H_2O)\)New reduction half-reaction
\(5PbO_2+20H^++10e^-\rightarrow5Pb^{2+}_{}+10H_2O)\)Step 9: Cancel electrons and combine the half-reactions
Overall reaction
\(2Mn^{2+}+8H_2O+5PbO_2+20H^+\rightarrow2MnO^-_4+16H^++5Pb^{2+}+10H_2O\)Step 10: Balance the chemical equation by reducing the number of water molecules and protons.
Overall reaction
\(2Mn^{2+}+5PbO_2+4H^+\rightarrow2MnO^-_4+5Pb^{2+}+2H_2O\)2) The balanced chemical equation
Overall reaction
\(2Mn^{2+}+5PbO_2+4H^+\rightarrow2MnO^-_4+5Pb^{2+}+2H_2O\).
A chemistry student measures out 41 grams of sodium hydroxide, NaOH. They react it with an excess of hydrochloric acid, HCl, forming water and sodium chloride, NaCl. After boiling away the water and the HCl, they find the mass of the NaCl to be 25.5 grams. What is their percent yield? (Don't forget to write a balanced equation)
Answers
In the future the universe will most likely
Answers
Answer:A
Explanation: The universe is always expanding at all times. It dosnt expand that much though, very little
Given the following value, is the starting material or product lower in energy? Select the single best answer. Delta G degree = -37 kJ/mol A. starting material B. product
Answers
The answer is product.
The free energy of a thermodynamic system is referred to as the Gibbs free energy or Gibbs energy. The Gibbs free energy is a thermodynamic quantity that represents the thermodynamic system's ability to do reversible work.The formula for Gibbs energy is shown below:
ΔG = ΔH - TΔS
where:ΔG: the Gibbs free energy of the system
ΔH: the enthalpy of the systemT: the temperature of the system
ΔS: the entropy of the system
The Gibbs free energy can be calculated using the following formula:
ΔG° = - RT lnK
where:ΔG°: the Gibbs free energy at standard state
R: the gas constant
T: the temperature in kelvins
K: the equilibrium constant
The value of ΔG° determines the direction in which a chemical reaction will proceed. A negative ΔG° means that the reaction is spontaneous, while a positive ΔG° means that the reaction is non-spontaneous.
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which of the elements listed below has the highest first ionization energy? question 9 options: he ne ar kr xe
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The largest initial ionization energy belongs to Helium. It is the first member of the noble gas group in the periodic table and is a colorless, odorless, tasteless, inert, monatomic gas.
Where can one find helium?Helium is used as a coolant in nuclear reactors, in compressed air tanks, and in lasers. Of all the elements, Helium has the lowest melting and boiling points.
What purpose serves helium?A typical carrier gas for gas chromatography is Helium. It can be used to determine the age of rocks and minerals that contain uranium and thorium.
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during one of the trials in this project, the initial weight of ethanol is 77 g and after the combustion, the final weight of ethanol is 10. what are the number of moles of ethanol consumed during the experiment? the molar mass of ethanol is 46.07 g/mol. report and round your answer to the first decimal place.
Answers
The number of moles of ethanol consumed during the experiment is
The combustion reaction is given as :
C₂H₅OH + 3O₂ -----> 2CO₂ + 3H₂O
the initial weight of ethanol = 77 g
the final weight of ethanol is = 10 g
initial moles = mass / molar mas
= 77 / 46.07
= 1.67 g
final moles = mass / molar mass
= 10 / 46.07
= 0.21 mol
the moles consumed = 1.67 - 0.21 = 1.46
thus, during one of the trials in this project, the initial weight of ethanol is 77 g and after the combustion, the final weight of ethanol is 10. the number of moles of ethanol consumed during the experiment. the molar mass of ethanol is 46.07 g/mol is 1.46 mol
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which of the following statements explains the solubility of ionic substances in water
a)water is a covalent substance
b)an oxygen atom has six electrons in its outermost level
c)water molecules are polar
d)the molar mass of water is 18.02 g/mol
Answers
c h20 gives h+ and oh-
h20 gives h+ and oh-
What is the value proposition for consumers that Takealot
excels at? How is this different from traditional (non-online)
retailers.Don’t Confuse Platforms with Ecosystems (INSEAD
Blog), December 202
Answers
Takealot excels at providing convenience, extensive product selection, competitive pricing, and a seamless online shopping experience as its value proposition for consumers.
Convenience is a key aspect of Takealot's value proposition. As an online retailer, Takealot offers the convenience of 24/7 shopping from the comfort of one's own home.
Customers can browse a wide range of products, place orders, and have them delivered directly to their doorstep.
Takealot also offers an extensive product selection, spanning various categories such as electronics, fashion, home goods, and more.
This breadth of choices allows consumers to find and compare different products all in one place, saving them time and effort compared to traditional retailers with limited inventory.
Competitive pricing is another area where Takealot excels. By operating online, the company has lower overhead costs compared to brick-and-mortar retailers, enabling them to offer competitive prices and discounts to their customers.
The seamless online shopping experience provided by Takealot includes user-friendly interfaces, secure payment options, and efficient delivery services. This enhances customer satisfaction and convenience.
In contrast, traditional non-online retailers typically have limited operating hours, smaller product selections, and may not offer the same level of convenience and competitive pricing.
They often require customers to physically visit their stores, which can be time-consuming and may not provide the same level of ease and accessibility as online platforms like Takealot.
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If the average person needs 0. 8 grams of protein per kilogram of body weight and tim needs 25 percent more protein than the average individual does in order to support his fitness goals, how much protein does he need per gram body weight?.
Answers
The protein needed by Tim per gram of body weight is 1 gram protein.
Let's calculate the protein need for Tim per kilogram of body weight
Average person protein need = 0.8 g per kilogram of body weight
Protein need of Tim = Average protein need of a person + 25% of the average protein need of a person
Average protein need of a person = 0.8 g per kilogram of body weight
25% of the average protein need of a person = 0.25 × 0.8 g/kilogram
body weight= 0.2 g/kilogram body weight
Protein need of Tim = 0.8 g/kilogram body weight + 0.2 g/kilogram body weight= 1 g protein/kilogram body weight
Protein needed by Tim per gram body weight = protein need per kilogram body weight/1000
Protein needed by Tim per gram body weight = 1 g/1000= 1 gram protein (as there are 1000 grams in 1 kilogram)
Therefore, Tim needs 1 gram of protein per gram body weight.
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Yo help a brother out you don’t want me to fail right
Answers
a. The names for the compounds in the task above are given below:
Fe2O3: Ferric oxide NiCl: Nickel chloride Co3P: Cobalt (II) phosphide Co3N2: Cobalt (II) NitrideAg2S: silver silver sulfideFeCl2: Iron(II) chlorideFeCl3: Iron(III) chlorideHNO3: Hydrogen trioxonitrate VH2CO3: Hydrogen trioxocarbonateIVb. The correct formulas for the compounds in the problem above are:
Copper (II) sulfide: CuSMecury (IV) chloride: HgCl2Iron (I) nitride: Fe2NZinc (II) bromide: ZnBr2Vanadium (V) oxide: V2O5Silver (III) phosphide: Ag3PNickel (II) sulfide: NiSHydrofluoric acid: HF.What is meant by the formula of a chemical compound?The formula of a compound is the chemical representation of chemical substance. The symbols of the individual elements which forms the compound is used in analysing the chemical formula of particular compund.
From the task given above, HNO3 is a compound which is formed by hydrogen, nitrogen and oxygen and their symbols are used to form the formula.
In conclusion, it can be deduced from the explanation given above that the formulae of chemical species is used to represent chemical equation.
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How many moles of water (H2O) are needed to react completely with 7. 3 moles of iron (Fe)? *
2 points
5. 5 mol water
2. 4 mol water
4. 0 mol water
9. 7 mol water
Answers
D. 9. 7 mol of water are needed to react completely with 7. 3 moles of iron (Fe)
To determine the number of moles of water needed to react completely with 7.3 moles of iron (Fe), we need to balance the chemical equation for the reaction between iron and water. The balanced equation is:
3 Fe + 4 \(H_{2}O\) -> \(Fe_{3}O_{4}\) + 4 \(H_{2}\)
According to the balanced equation, 4 moles of water are required to react with 3 moles of iron. This means that the stoichiometric ratio between water and iron is 4:3.
Given that we have 7.3 moles of iron, we can use this ratio to calculate the amount of water needed. We set up the following proportion:
4 moles \(H_{2}O\) / 3 moles Fe = x moles \(H_{2}O\) / 7.3 moles Fe
Cross-multiplying and solving for x, we find:
x = (4 moles \(H_{2}O\) / 3 moles Fe) * 7.3 moles Fe
= 9.73 moles \(H_{2}O\)
Therefore, approximately 9.7 moles of water are needed to react completely with 7.3 moles of iron. The closest option provided is 9.7 mol water. Therefore, Option D is correct.
The question was incomplete. find the full content below:
How many moles of water (\(H_{2}O\)) are needed to react completely with 7. 3 moles of iron (Fe)? * 2 points
A. 5. 5 mol water
B. 2. 4 mol water
C. 4. 0 mol water
D. 9. 7 mol water
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Two substances in a mixture differ in density and particle size. theses properties can be used to
Answers
Answer:
option 1. Two substances in a mixture differ in density and particle size. These properties can be used to separate the substances. These properties can be manipulated in order to have a better separation between the two substances.
Explanation:
Answer:
Two substances in a mixture differ in density and particle size. These properties can be used to separate both of them using the separating funnel or using filtration (filter paper).
Explanation:
Since their densities are different, one substance should float above the other in the mixture which allows for the separating funnel to let the substance sinking below (with the heavier density) to flow out first before changing the beaker to let the lighter substance flow out.
The substance with a bigger particle size would not be able to pass through the filter paper unlike the substance with the smaller particle size as the filter paper's pores is not big enough for it to pass through, separating both substances (with one on the paper and the other outside the filter paper, preferably in the beaker placed below the paper).
Burets are often used to carefully measure the amount of liquid added to a reaction. The long thin buret tube is marked every milliliter and every tenth of a milliliter. Which of the following measurements is correct for a volume of liquid in a buret?
a. 30 ml
b. 32 mL
c. 32.0 mL
d. 32.01 mL
Answers
Answer:
c. 32.0 mL
Explanation:
Buret can measure upto one tenth of a mL . That means it can measure upto one decimal point of a mL . Out of given measurement 32.0 mL reads upto one decimal point of mL so this reading seems to be the reading taken of a liquid in a buret.
A(n) _____ may be defined as a compound which contributes hydroxide ions or increases the OH- concentration when dissolved in water.
salt
base
ester
acid
Answers
Answer:
Base
Explanation:
Bases on dissolving with water release hydroxide ions
Take a example of Sodium hydroxide
NaOH+H_2O-->Na_0+OH-in general, when the addition of an unsymmetrical electrophilic reagent to an unsymmetrical alkene forms the product predicted by markovnikov's rule, which occurs because:
Answers
The correct answer is it is formed via the more/most stable carbocation.
The following reaction occurs between unsymmetrical alkene (CH₃CH=CH₂) and unsymmetrical electrophilic reagent (H-Br) -
CH₃CH=CH₂ + H-Br → CH₃-CH(Br)-CH₃ + H₃C-CH₂-CH₂-Br
CH₃-CH(Br)-CH₃ is the primary product because it is formed via a secondary carbocation intermediate. In comparison, H₃C-CH₂-CH₂-Br is the minor product because it is created via a primary carbocation intermediate. The stability of secondary carbocation is higher as compared to the primary carbocation. These products are according to Markovnikov's rule.
The above discussion suggests that option C is the correct answer.
What is markovnikov's rule?
Markovnikov's rule states that when an asymmetrical reagent is added to an asymmetrical alkene, then the negative half of the reagent will attach to the carbon atom containing fewer hydrogen atoms.
Learn More about Markovnikov's Rule here :
https://brainly.com/question/28348492?referrer=searchResults
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The following reaction is a
reaction.
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Answer:
??
Explanation:
give me song lyrics that use
To break we add
To add we break (correct me if I'm wrong)
and lyrics should be related to chemistry
Due in 10 mins
Answers
good luck with the song lyrics, you got this! :)