Answer:
False
Explanation:
they don't have to
#9 Balance the redox reaction by inserting the appropriate coefficients.
redox reaction:
Fe^{3 + } + NO_{2}^{-} + H_{2}O -> Fe^{2 + } + H^{ + } + NO_{3}^{-}
Fe3++NO−2+H2O⟶Fe2++H++NO−3
The balanced redox reaction is
\(3F(e)_3+ + 2N O^{-2} + 4H_2O\)→ \(3F(e)_2+ + 2N O^{-3} + 4H+\)
Let's start balancing the redox reaction. Here is the given redox reaction:
\(3F(e)_3+ + 2N O^{-2} + 4H_2O\) → \(F(e)_2+ + H+ + N O^{-3}\)
Step 1: Separate the redox reaction into two half-reactions.Half-reaction 1: \(F(e)_3+\)→ \(F(e)_2+\) Half-reaction 2: \(N O^{-2}+ H_2O\) → \(N O^{-3}+ H+\)
Step 2: Balance the elements other than H and O in each half-reaction. Balanced Half-reaction 1: \(F(e)_3+\) →\(F(e)_2+\)Balanced Half-reaction 2: \(N O^{-2} + H_2O\) → \(N O^{-3} + H+\)
Step 3: Balance the oxygen atoms by adding H2O to the side that needs oxygen . Balanced Half-reaction 1: \(F(e)_3+\) → \(F(e)_2+\) Balanced Half-reaction 2: \(N O^{-2}+ H_2O\) →\(N O^{-3} + H+ + H_2O\)
Step 4: Balance the hydrogen atoms by adding H+ to the side that needs hydrogen . Balanced Half-reaction 1: \(F(e)_3+\) → \(F(e)_2+\) + e− + H+Balanced Half-reaction 2: \(N O^{-2} + H_2O + H+ - > N O{-3}+ H+ + H_2O + e^-\)
Step 5: Determine the number of electrons required to balance the half-reaction . Balanced Half-reaction 1: \(F(e)_3+ - > F(e)_2+ + e^{-}+ H+\) [3 electrons are required]Balanced Half-reaction 2: \(N O^{2} + H_2O + H+ - > N O^{-3} + H+ + H_2O + e^-\)[2 electrons are required]
Step 6: Multiply the half-reactions by integers to make the number of electrons equal for both half-reactions.Balanced Half-reaction 1:\(3(F(e)_3+ - > F(e)_2+ + e^{-} + H+\) ).Balanced Half-reaction 2: \(2(N O^{-2} + H_2O + H+ - > N O^{-3}+ H+ + H_2O + e^{-})\)
Step 7: Add the balanced half-reactions together\(3F(e)_3+ + 2N O^{-2} + 4H+ - > 3F(e)_2+ + 2N O^{-3} + 2H_2O\) .The balanced redox reaction is:\(3F(e)_3+ + 2N O{-2} + 4H_2O - > 3F(e)_2+ + 2N O^{-3} + 4H+\)
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A sample of oxygen gas at a pressure of 1.19 atm and a temperature of 24.4 °C, occupies a volume of 18.7 liters. If the gas is allowed to expand at constant temperature to a volume of 29.4 liters, the pressure of the gas sample will be ______ atm.
Answer:
\(\boxed {\boxed {\sf 0.757 \ atm}}\)
Explanation:
We are asked to find the pressure of a gas given a change in volume. Since the temperature remains constant, we are only concerned with volume and pressure. We will use Boyle's Law, which states the volume is inversely proportional to the pressure. The formula for this law is:
\(P_1V_1= P_2V_2\)
Initially, the oxygen gas occupies a volume of 18.7 liters at a pressure of 1.19 atmospheres.
\(1.19 \ atm * 18.7 \ L = P_2V_2\)
The gas expands to a volume of 29.4 liters, but the pressure is unknown.
\(1.19 \ atm * 18.7 \ L = P_2 * 29.4 \ L\)
We are solving for the new pressure, so we must isolate the variable \(P_2\). It is being multiplied by 29.4 liters. The inverse operation of multiplication is division. Divide both sides of the equation by 29.4 L.
\(\frac {1.19 \ atm * 18.7 \ L}{29.4 \ L} =\frac{ P_2 * 29.4 \ L}{29.4 \ L}\)
\(\frac {1.19 \ atm * 18.7 \ L}{29.4 \ L} =P_2\)
The units of liters cancel.
\(\frac {1.19 \ atm * 18.7 }{29.4 } =P_2\)
\(\frac {22.253}{29.4 } \ atm = P_2\)
\(0.7569047619 \ atm =P_2\)
The original measurements all have 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place. The 9 in the ten-thousandth place to the right of this place tells us to round the 6 up to a 7.
\(0.757 \ atm \approx P_2\)
The pressure of the gas sample is approximately 0.757 atmospheres.
According to Boyle's law, for a given mass of ideal gas, pressure of gas is inversely proportional to the volume of gas, Provided the Temprature remains constant.
P₁ = 1.19 atmP₂ = ?V₁ = 18.7 LV₂ = 29.4 LT = constant = 24.4° C = Isothermal process\(\implies \sf P_1 V_1 = P_2 V_2 \\ \)
\(\implies \sf 1.19 \times 18. 7= P_2 \times 29.4 \\\)
\(\implies \sf 22.253= P_2 \times 29.4 \\\)
\(\implies \sf P_2 = \dfrac{22.253}{29.4} \\\)
\(\implies \underline{ \red{\boxed{ \bf P_2 \approx0.756 \: atm }}} \\\)
How many liters of blood does a human body have
Answer:
20000
Explanation:
Check the box under each molecule in the table below that is an isomer of this molecule:
The branched alkanes in boxes two and three all have molecular formula C6H14 and are isomers of the compound shown.
Isomers are compounds that has the same molecular formula but different structural formulas. Hence, isomers of compounds can be represented by the same molecular formula since they contain the same number of each atom.
The molecule shown has molecular formula C6H14. The branched alkanes in boxes two and three all have molecular formula C6H14 and are isomers of the compound shown.
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What color does red cabbage juice make when mixed with a citrus cleaner?
What color does red cabbage juice make when mixed with a dishwasher soap?
(WILL MARK BRAINLIEST!!!)
Answer:
Explanation:
green
Which one of the following compounds is insoluble in water?
A) Ba(OH)2
B) Ca3(PO4)2
C) NH4S04
D) Rb2CO3
Answer:
Ca3(PO4)2
Explanation:
Ca3(PO4)2 or calcium phosphate is insoluble in water.
What mass of NaCl is needed to produce a 26.4 mol/L with a 1.7 L volume?
we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.
To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.
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Can u please help me answer all of these questions with explanation? :(
Answer:
Solute Temperature before dissolving (°C) Temperature immediately after dissolving (°C) Temperature change (°C)
A potassium chloride 23 10 13
B sodium hydrogencarbonate 23 17 6
C calcium chloride 23 30 -7
D sodium chloride 23 23 0
Based on the given data, the best conclusion is given by Habibah who concluded that solutes A and B take in energy from the surroundings when they dissolve. This conclusion is supported by the fact that the temperature change is positive for solutes A and B, which indicates an endothermic reaction where energy is absorbed from the surroundings. In contrast, the temperature change is negative for solute C, indicating an exothermic reaction where energy is released to the surroundings. The conclusion given by Habibah is more accurate and consistent with the observed data compared to the other conclusions.
What is the IUPAC name of the following substance?
The International Union of Pure and Applied Chemistry (IUPAC) provides a standard system for naming organic compounds.
It is essential to learn this nomenclature system to communicate correctly about the chemical structures of compounds and how they relate to each other. Here is the IUPAC name of the following substance.Below is the structure of the given compound: In the given compound, there are four carbon atoms that are connected with single bonds. Carbon atoms are also attached to hydrogen atoms. Since it has four carbons in the main chain, the root name will be "but-". The functional group present in the molecule is the carboxylic acid group (-COOH), which gives the suffix "-oic acid." Therefore, the IUPAC name of the given substance is Butanoic acid.Thus, the IUPAC name of the given compound is Butanoic acid. It is essential to know the IUPAC naming of organic compounds to communicate correctly about the chemical structures of the compounds.
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Which statement accurately describes a type of potential energy found in a container full of a chemical substance in liquid form?
A) The rotation of the particles in one place where potential energy is stored.
B) The vibration of the atoms in molecules is one place where potential energy is stored.
C) The bonds between atoms are one place where potential energy is stored.
D) The speed of the particles is one place where potential energy is stored
Answer:
The bonds between atoms are one place where potential energy is stored.
When zinc reacts with copper sulfate solution, zinc sulfate solution and copper are formed.(i) An experiment was carried out to measure the temperature change when zinc powder reactswith copper sulfate solution.initial temperature of copper sulfate solution = 20 °Cfinal temperature of mixture after the reaction = 46 °CExplain what the temperature readings show about the type of heat change that occurs duringthis reaction.
The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.
In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.
The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.
During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.
The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.
The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.
In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.
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which compound can lower the freezing temperature of water, similarly to the antifreeze used in automobiles, and allow certain fish to remain active in very cold water? please choose the correct answer from the following choices, and then select the submit answer button. answer choices acetylcholine
"antifreeze proteins" or "ice-binding proteins", lower the freezing temperature of water, similarly to the antifreeze used in automobiles, and allow certain fish to remain active in very cold water.
Antifreeze proteins function by binding to ice crystals and preventing them from growing, which in turn prevents the formation of ice within the tissues of the organism. This allows the organism to remain active in very cold water, even when the water temperature is below the freezing point of pure water.
Acetylcholine is not a compound that can lower the freezing temperature of water.It is important to note that antifreeze proteins are a specialized adaptation that has evolved in certain organisms to help them survive in extremely cold environments, and they should not be confused with the antifreeze used in automobiles, which is a mixture of chemicals designed to lower the freezing point of the liquid in a car's cooling system.
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What are the concentrations of HSO, SO and H+ in a 0.20 M KHSO4 solution?
The concentration of the solution is as follows;
H⁺ = 0.045 M
SO₄(²⁻) = 0.045 M
HSO₄⁻ = 0.155 M
How do we solve for the concentration of HSO, SO and H+?Potassium hydrogen sulfate, KHSO₄ is a salt that will completely dissociate in water into its constituent ions, K+ and HSO₄⁻.
HSO₄⁻ ⇌ H⁺ + SO₄(²⁻)
Let's say x is the amount of HSO4- that dissociates. Then it will be
HSO₄⁻ = 0.20 - x
H⁺ = x
SO₄(²⁻) = x
Now, we can use the Ka for HSO4-, which is given as 1.3 x 10⁻². We will get the equation
Ka = (H⁺)(SO₄(²⁻)) / (HSO₄⁻ )
Substituting the expressions for the equilibrium concentrations gives:
1.3 x 10⁻² = (x)(x) / (0.20 - x)
So the concentrations are:
HSO₄⁻ = 0.20 - x = 0.20 - 0.045 = 0.155 M
H⁺ = x = 0.045 M
SO₄(²⁻) = x = 0.045 M
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Find the SDS for regular bleach
The Safety Data Sheet (SDS) for regular bleach can be obtained from the manufacturer or supplier of the specific brand or product. It contains important information regarding the hazardous properties, handling, storage, and emergency procedures related to the bleach.
An SDS typically includes details such as the product's chemical composition, physical and chemical properties, potential hazards to health and the environment, precautionary measures for safe handling and storage, first-aid procedures, and information about proper disposal. It also provides guidance on personal protective equipment (PPE) to be used when handling the product and steps to take in case of accidental release or exposure.
The SDS serves as a crucial resource for understanding the potential risks associated with the use of regular bleach and helps ensure that appropriate safety measures are implemented. It is important to review and follow the information provided in the SDS to minimize the risk of accidents, injuries, or adverse health effects associated with the use of the product.
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why is soaking necessary for seed germination
Answer:
Explanation:
well it needs water like us to stay alive
Percent composition of BF3
The molar mass of the compound BF₃ is 66 g/mol. Percent composition of fluorine in this compound is 86.3 % and that of boron is 13.7 % .
What is mass percent ?Mass percent is a common term used to express the composition or concentration of a compound. Mass percent of an element in a compound is the ratio of its mass to the total mass of the compound multiplied by 100.
BF₃ is a covalent compound formed through the sharing of electrons between boron and fluorine.
atomic mass of fluorine = 19 g/mol
atomic mass of boron = 9 g/mol
mass of 3 F = 3 × 19 = 57 g
Molar mass of BF₃ = 57 + 9 = 66 g/mol
Mass percent of F = 57 g/66 × 100 = 86.3 %
mass percent of B = 9 /66 = 13.7 %.
Therefore, percent of composition of B and F in BF₃ are 86.3 and 13.7 % respectively.
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a
What did you discuss in your response? Check all that
apply.
Sample Response: Using a historical perspective helps
the reader understand that Nnaemeka's decision to marry
Nene goes against long-standing traditions. He marries
for love instead of taking part in an arranged marriage.
He also marries outside of his tribe. As a result of his
choice, his father shuns him. A feminist perspective
reveals the marriage also goes against patriarchal values
in this society. Women are expected to be homemakers.
However, Nene is a teacher and does not fit the
expectation. Both perspectives help the reader
understand opposition to the marriage. However, one
approach focuses on tradition, while the other focuses on
the treatment of women in their culture.
cultural values
feminist perspective
historical perspective
similarities between the two perspectives
differences between the two perspectives
One approach focuses on tradition, while the other focuses on the treatment of women in their culture the response is cultural value. Hence option A is correct.
What are traditions?Traditions are defined as a notion or practice that has been passed down within a community or society and has unique importance or symbolic value that dates back in time. Traditions are notions and convictions that are passed down from generation to generation.
Cultural value are defined as the fundamental values and concepts that underpin a community's existence and provide a foundation for its protection and reliance on peaceful coexistence. Cultural values are the fundamental notions of right and wrong held by a culture.
Thus, one approach focuses on tradition, while the other focuses on the treatment of women in their culture the response is cultural value. Hence option A is correct.
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Answer: only culture value
Explanation: just answered it
The rotational spectrum of 79BrºF shows a series of equidistant lines spaced 0-714 33 cm - apart. Calculate the rotational constant B, and hence the moment of inertia and bond length of the molecule. Determine the wavenumber of the J = 9+= 10 transition, and find which transition gives rise to the most intense spectral line at room temperature (say 300 K).
and calculate the number of revolutions per second which the Brf molecule undergoes when in (a) the J = 0 state, (b) the J = 1 state, and (c) the J = 10 state. Hint: Use E = {lwin conjunction with Eqs (2.10) and (2.13), but remember that here w is in radians per second.[its Q season 2 from fundamentals of molcular spectruscopy . banwell.c.n]
In the J = 0 state, the BrF molecule does not undergo any revolutions per second. In the J = 1 state, it undergoes approximately 0.498 revolutions per second, and in the J = 10 state, it undergoes approximately 15.71 revolutions per second.
To calculate the rotational constant B, we can use the formula:
B = 1 / (2 * π * Δν)
Where:
B = rotational constant
Δν = spacing between consecutive lines in the rotational spectrum
Given that the spacing between consecutive lines is 0.71433 cm^(-1), we can substitute this value into the formula:
B = 1 / (2 * π * 0.71433 cm^(-1))
B ≈ 0.079 cm^(-1)
The moment of inertia (I) of the molecule can be calculated using the formula:
I = h / (8 * π^2 * B)
Where:
h = Planck's constant
Given that the value of Planck's constant (h) is approximately 6.626 x 10^(-34) J·s, we can substitute the values into the formula:
I = (6.626 x 10^(-34) J·s) / (8 * π^2 * 0.079 cm^(-1))
I ≈ 2.11 x 10^(-46) kg·m^2
The bond length (r) of the molecule can be determined using the formula:
r = sqrt((h / (4 * π^2 * μ * B)) - r_e^2)
Where:
μ = reduced mass of the molecule
r_e = equilibrium bond length
To calculate the wavenumber (ν) of the J = 9+ to J = 10 transition, we can use the formula:
ν = 2 * B * (J + 1)
Substituting J = 9 into the formula, we get:
ν = 2 * 0.079 cm^(-1) * (9 + 1)
ν ≈ 1.58 cm^(-1)
To determine the most intense spectral line at room temperature (300 K), we can use the Boltzmann distribution law. The intensity (I) of a spectral line is proportional to the population of the corresponding rotational level:
I ∝ exp(-E / (k * T))
Where:
E = energy difference between the levels
k = Boltzmann constant
T = temperature in Kelvin
At room temperature (300 K), the population distribution decreases rapidly with increasing energy difference. Therefore, the transition with the lowest energy difference will have the most intense spectral line. In this case, the transition from J = 0 to J = 1 will have the most intense spectral line.
To calculate the number of revolutions per second, we can use the formula:
ω = 2 * π * B * J
Where:
ω = angular frequency (in radians per second)
J = rotational quantum number
For J = 0:
ω = 2 * π * 0.079 cm^(-1) * 0 = 0 rad/s
For J = 1:
ω = 2 * π * 0.079 cm^(-1) * 1 ≈ 0.498 rad/s
For J = 10:
ω = 2 * π * 0.079 cm^(-1) * 10 ≈ 15.71 rad/s
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In which of the following compounds would the carbon-carbon bond angle diverge the greatest from the ideal tetrahedral angle?
Cyclopropane of the following compounds would the carbon-carbon bond angle diverge the greatest from the ideal tetrahedral angle.
What is Cyclopropane?The cycloalkane or cyclopropane has the chemical formula (CH2)3, and cyclopropane is made up of three methylene groups that are joined together to create a ring. The structure experiences significant ring strain as a result of the ring's modest size.
Use of cyclopropane:Since 1934, colorless gas has been used as a general anesthetic in medicine. Cyclopropane does not impair breathing and does not irritate mucosal membranes. Cyclopropane anesthesia is typically quickly induced and smoothly exhaled.To know more about Cyclopropane visit
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The complete question is:
In which of the following compounds would the carbon-carbon bond angle diverge the greatest from the ideal tetrahedral angle?
a. cyclodecane
b. cyclooctane
c. cyclopentane
d. cyclopropane
Given the potential energy diagram representing a reaction below, which numbered interval represents the heat of reaction?
Answer:
2
Explanation:
Heat of reaction is usually the difference of heat of products and heat of reactions. The difference here is represented by the letter 2.
The potential energy diagram has been representing the heat of reaction at interval 2.
The heat of reaction has been defined as the difference in the heat of product and reactant. The potential energy has been the stored energy of the compounds.
Potential Energy Diagram:In the given potential energy curve, the heat of reaction has been found to be the increase in potential energy. There has been an increment in the energy at interval 2.
Thus, the potential energy diagram has been representing the heat of reaction at interval 2.
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Which strand of hydrocarbons is used to produce plastic?
O Strand 2
O Strand 3
O Strand 4
●Strand 1
The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.
Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.
Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.
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conclusion for polarity of liquid
Answer:
The polarity of a liquid refers to the separation of electric charge within the molecules of the liquid, resulting in a positive and negative end. Based on this, we can draw the following conclusion:
In conclusion, the polarity of a liquid is an important property that affects its behavior and interactions with other substances. Polar liquids have molecules with an uneven distribution of charge, resulting in positive and negative ends. This polarity influences various aspects, such as solubility, surface tension, and the ability to dissolve other polar substances. Additionally, polar liquids tend to exhibit stronger intermolecular forces, leading to higher boiling and melting points compared to nonpolar liquids. Understanding the polarity of a liquid is crucial for various fields, including chemistry, biology, and material science, as it helps explain and predict the behavior and properties of different substances in a wide range of applications.
PLEASE MARK AS BRAINLIESTAnswer:
The polarity of a liquid refers to the separation of electric charges within the molecule, resulting in a molecule with a positive end and a negative end. The presence or absence of polarity in a liquid has significant implications for its behavior and interactions with other substances.
In conclusion, the polarity of a liquid plays a crucial role in determining its physical and chemical properties. Polar liquids, such as water, have an unequal distribution of charge within their molecules, leading to hydrogen bonding and strong intermolecular forces. These interactions give rise to properties like high boiling points, surface tension, and solubility, making polar liquids excellent solvents and essential for many biological processes.
On the other hand, nonpolar liquids, such as hydrocarbons, have a symmetrical distribution of charge and lack strong intermolecular forces like hydrogen bonding. As a result, they have lower boiling points, weaker interactions, and are typically less soluble in polar solvents. Nonpolar liquids are commonly used as solvents for nonpolar compounds and have different applications in various industries.
Understanding the polarity of a liquid is crucial in fields such as chemistry, biology, and materials science. It helps predict how substances will interact and dissolve in a given solvent, as well as how they will behave in chemical reactions. Additionally, polarity affects the physical properties of liquids, including their viscosity, conductivity, and surface behavior.
In summary, the polarity of a liquid is a fundamental characteristic that influences its behavior, solubility, and reactivity. Whether a liquid is polar or nonpolar has far-reaching consequences in various scientific disciplines and practical applications
What is the correct formula that would result from the combination of the two ionic species? Cu2+ and SO42-
Identify the atom that is oxidized/reduced and if it is the oxidizing agent/reducing agent in the following equation PCl3(l) + Cl2(g) --> PCl5(s)
\(PCl_3\) is a reducing agent, \(Cl_2\) is an oxidizing agent.
How do you explain a reduction reaction?A chemical reaction known as an oxidation-reduction (redox) reaction includes the exchange of electrons between two substances. Any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by acquiring or losing an electron is referred to as an oxidation-reduction reaction.Reduction is the term used to describe a reaction in which a reactant picks up electrons. This happens frequently when acid and metals interact. Oxidation is the process in which a reactant loses electrons during a reaction. Reduction is the term used to describe a reaction in which a reactant picks up electrons.\(PCl_3 + Cl_2 \rightarrow PCl_5\)
This is an oxidation-reduction (redox) reaction:
PIII - 2 e- → \(P^V\)(oxidation)
2 Cl⁰ + 2 e- → 2 Cl⁻¹ (reduction)
\(PCl_3\) is a reducing agent, \(Cl_2\) is an oxidizing agent.
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Give the name of one or more polysaccharides that matches each of the following descriptions:
a. not digestible by humans
b. the storage form of carbohydrates in plants
C. contains only oc (1-4)-glycosidic bonds
d. the most highly branched polysaccharide
Answer:
A Cellulose not digested by humans.
b. the storage form of carbohydrates in plants is starch
C amylose contains 1-4 glycosidic bond
D Glycogen and starch are highly branched polysaccharides.
Explanation:
The name of one or more polysaccharides that matches each of the following descriptions are given as: a. not digestible by humans- cellulose, b. the storage form of carbohydrates in plants-starch, c. contains only oc (1-4)-glycosidic bonds-amylose, d. the most highly branched polysaccharide-glycogen.
Monosaccharides—repeated sugar units—are joined by glycosidic linkages to form polysaccharides, which are large, complex carbohydrates. They are polymers consisting of hundreds of monosaccharide molecules or even thousands of them.
a. Humans cannot digest the carbohydrate known as cellulose. It is a part of the structure of plant cell walls.
b. The plant stores carbohydrates in the form of starch. It functions as a store of energy and is made up of the molecules amylose and amylopectin.
c. A polysaccharide called amylose only has linkages that are (1-4)-glycosidic. It consists of glucose units joined together by (1-4)-glycosidic linkages, and is a linear polymer.
d. The polysaccharide that has the most branches is glycogen. In particular, the liver and muscles, it is the most prevalent form of carbohydrate storage in both animals and people.
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How many grams of oxygen are there in 2.5 moles of oxygen (O2) molecules?
There are 80 gram of oxygen molecule present in 2.5 moles of \(O_{2}\) molecule.
What is moles?The mole (sign mol) is just the SI base unit of material quantity. The amount of substance in an object is a measurement of how many elementary units of a certain substance are present.
It can be represented as:
Moles = mass / molar mass
Calculation of mass of oxygen by using moles formula:
Given data:
Moles = 2.5
Mass = ?
Molar mass = 32.
Put the value of given data in moles formula:
Mass = moles × molar mass
Mass = 2.5 × 32
Mass = 80 gram
Therefore, there are 80 gram of oxygen molecule present in 2.5 moles of \(O_{2}\) molecule.
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How many moles is 7.78 x 1024
formula units of MgCl2?
How many moles is 7.78 x 1024
formula units of MgCl2?
answer: 7966.72
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, there are 0.49moles of MgCl\(_2\) in 7.78 x 10²⁴atoms of MgCl\(_2\) .
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
given number of atoms of MgCl\(_2\)= 7.78 x 10²⁴
Substituting the values
mole= 7.78 x 10²⁴÷ 6.022×10²³
mole = 0.49moles of MgCl\(_2\)
So, there are 0.49moles of MgCl\(_2\) in 7.78 x 10²⁴atoms of MgCl\(_2\) .
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50 POINTS
Assume that the variables x and y are inversely related. If k = 18, what is the value of y for each of the following points?
Be sure and record your data to be used in the following problem.
х y k
1 18
A: 18,0.05,9
2 18
A: 0.11,36,9
3 18
A: 0.16,6,54
6 18
A: 0.33,108,3
9 18
A: 162,0.5,2
18 18
A: 324,0.75,1
Answer:
9/.05=180. I think it's 1
Explanation:
If x and y are inversely proportional then the product of xy =k or y=k/x
Suppose that 1500 kJ of energy were transferred to water at 20.0°C. What mass of water could be brought to
the boiling point? Heat capacity (c) for liquid water is
4.18 J/g C
O 548 g
O 648 g
4486 g
11
O 440 g
The mass of the water that could be brought to the boiling point is equal to 4481.35 g. Therefore, option (C) is correct.
What is the specific heat capacity?The specific heat capacity of a substance is defined as the quantity of heat required to increase the temperature in one unit of substance by one-degree Celcius.
Whenever the energy is lost or absorbed the temperature of the substance will be changed:
Q = mCΔT
Given, the amount of energy transferred, Q = 1500 Kj
The change in the temperature = 100 -20 = 80°C
The specific heat capacity of the water, C = 4.184 J/g°C
The mass of the water for the given change in temperatures can be calculated as:
1500 KJ = m × (4.184 J/g°C) × 80°C
m = 4481.35 g
Therefore, the mass of the water is 4481/35 grams.
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Why is geothermal energy not used as
frequently as other renewable energy source?
Answer:
Because its source is the almost unlimited amount of heat generated by the Earth's core. Even in geothermal areas dependent on a reservoir of hot water, the volume taken out can be reinjected, making it a sustainable energy source.
Explanation:
Geothermal energy is underutilized and underutilized in comparison to other renewable energy sources such as solar and wind energy. This is due to the difficulty of extracting energy from the subsoil, as complications can arise that affect both the environment and the cost of energy.
What is geothermal energy ?Geothermal energy is the thermal energy in the Earth's crust that results from the planet's formation and radioactive decay of materials in currently unknown but potentially roughly equal proportions.
Geothermal energy is not always a renewable energy source because the extraction of heat from the earth's crust over time can cause depletion, causing some geothermal wells to cool and run out of water.
Geothermal energy can be found at depths accessible by drilling in these areas. It is simply too deep to reach in other parts of the world. The second reason is that it has high capital expenses. The costs of drilling and power plants are somewhat high.
Thus, Geothermal energy is underutilized and underutilized in comparison to other renewable energy sources such as solar and wind energy.
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