Drink mix concentrations and absorbances for constructing a standard curve
concentration (mm) concentration (m) absorbance
sample 1 200 0.200 0.52
sample 2 77 0.077 0.18
sample 3 32 0.032 0.08
sample 4 300 0.300 0.77
sample 5
a. plot your data of absorbance versus concentration (in m) using excel. add a trendline and display the equation of the line to determine the slope and y intercept. please review the video on using excel if needed. enter the slope of the trendline
enter the y-intercept of the trendline
b. using the molar absorptivity (slope) determined from your plot, calculate the expected concentration (in m) of a drink mix solution with an absorbance of 0.66.
c. choose the statement that best answers the following question
can you use your plot to predict the absorbance of a 214 mm solution of nickel(ii) chloride and why?
a. yes, because the same instrument is used for the measurement of the new compound.
b. yes, because you can use the same cuvette for the measurement of the new compound
c. no, because the determined absorptivity applies only to the compound measured.

Answer:

2450000 gram

Explanation:

v= m × ρ= 1 cubic meter × 2.45 gram/cubic centimeter= 1000000 cubic centimeter × 2.45 gram/cubic centimeter= 2450000 gram

Explanation:

v=m over D

mass=20.oog

Density=2.45g

20.00-2.45

ans is 17.46

41ml of 43% vinegar in water solution can be made by mixing 17.63ml vinegar in 23.37ml of water.

According to condition, the total volume of the solution to be made should be 41ml and it should have a concentration of 43% of vinegar in it.

43% of the 41ml can be calculated using percentage formula, we can find the concentration required,

Let say we have to add L ml of vinegar to make the solution, then,

%age = Amount to be obtained/ total amount x 100

43 = L/41 x 100

L =  41 x 43/100

L = 1763/100

L = 17.63 ml.

Total volume of the solution is 41ml,

So the amount of the water needed,

Water needed = 41ml - 17.63ml

water needed = 23.37ml

So we can conclude,

41ml of 43% vinegar in water solution can be made by mixing 17.63ml of vinegar with 23.37ml of water.

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Answer:

It is NOT B (Silk Road trade network), I repeat NOT B, but I think it could be A (Indian Ocean trade network)

Explanation:

I took the quiz and chose B (Silk Road trade network) and it was INCORRECT. As for A (Indian Ocean trade network), I looked back at the lesson and it doesn't mention anything about D (the Songhai trade network), which rules that one out, so now it's between A and C. I don't think it's C (trans-Saharan trade network) because although it was near the Arabian Peninsula, it said that it trades with civilizations in the Saharan Desert and people who live near the Mediterranean Sea. It also said nothing about trading with Europe (Roman Empire at that time) along the trans-Saharan trade network. So that's why I'm thinking it could be the Indian Ocean trade network because 1. it's the only one that makes sense after we've ruled out the others 2. It traded with the Arabian Peninsula, and since it traveled over water, I'm thinking it could've gotten to Europe. Then again I could be wrong, but keep these in mind while answering.

Answer:

A

Explanation:

Took the test and got it right

Answer:

Diastereomers can have different physical properties and reactivity. They have different melting points and boiling points and different densities.

Answer:

the answer is b beacuse the substance changed

Answer:

216/84 Po + 4/2 He a

Explanation:

Answer:

Problem: Polonium-210, 210Po, decays to lead-206, 206Pb, by alpha emission according to the equation 21084Po → 20682Pb + 42He

Explanation:

Answer:

This is because water molecules are made of atoms. Atoms may have special ends that attract to each-other magnetically, causing the water to look like it merges into 2 different drops.

Answer:

1 Zn + 2 HCl ⇒ 1 H₂ + 1 ZnCl₂

Hope this helps!!!

Answer:

47.596008

Explanation:

Answer:

1.03 mol of dihydrogen gas will evolve, with a volume slightly over

22.4 \(dm^{3}\) at STP.

Explanation:

Answer:

chemical, is the answer your looking for

Two elements having same properties as magnesium are calcium and strontium. The number of protons and neutrons in  potassium is 19 and number of neutrons is 20.

Groups in periodic table are vertical columns with elements of similar physical and chemical properties. All elements are classified into different groups based in the number of valence shell electrons.

Elements of same group have same number of valence electrons. The element magnesium Mg have 12 electrons with 2 valence electrons. Its group members are shown under Mg in the column and they are calcium, strontium and rubidium.

Number of electrons in an tom is equal to the number of protons and this is called the atomic number. The atomic number o potassium is 19 and it have 19 electrons and protons.

Number of electrons = mass number-number of protons

                                   = 39 -19 =20.

Hence, potassium  (K) have 19 electrons and protons and 20 neutrons.

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The volume of a substance is generally measured in Milliliters, Liters, cm³, m³ and sometimes in galloons. The volume of 29.7ml of water graduated cylinder is 29.7.

The volume of a substance is the measure of the capacity that an object holds. For example, if a beaker can hold 100 mL of water then the volume of the beaker is said to be 100 mL. The SI unit of volume is m³ .

The volume can be calculated from the density and mass as:

Density = Mass / Volume

Volume = Mass / Density

Thus the capacity of 29.7ml of water graduated cylinder is 29.7.

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Explanation:

I think the notation used to represent beta is B

Answer:

\(\frac{0}{-1} \beta\)

Explanation:

A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]

Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.

Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.

~Wikipedia

Therefore, 1000 grams of  CaBr₂, is equivalent to 4.63 moles of \(CaBr_2\).  

The number of moles of  CaBr₂, in 1000 grams, we need to use the molecular formula of CaBr₂, which is CaBr₂,.

The molecular formula of CaBr₂, is CaBr₂,, which tells us that there is one calcium (Ca) atom, two bromine (Br) atoms, and two bromine (Br) atoms in one molecule of  CaBr₂,.

The molecular weight of CaBr₂, is the sum of the atomic weights of all the atoms in the molecule. The atomic weight of calcium (Ca) is 40.08 g/mol, the atomic weight of bromine (Br) is 79.90 g/mol, and the atomic weight of bromine (Br) is 79.90 g/mol.

Therefore, the molecular weight of CaBr₂, is:

40.08 g/mol + 79.90 g/mol + 79.90 g/mol = 219.78 g/mol

To convert the mass of CaBr₂, to moles, we need to divide the mass by the molecular weight:

Moles of  CaBr₂, = Mass of CaBr₂, / Molecular weight of CaBr₂,

1000 g = 1000 g / 219.78 g/mol

Moles of  CaBr₂, = 4.63 mol

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According to Gay-Lussac's law, if the original temperature is doubled at constant volume the new pressure is 6 atmospheres.

Gay-Lussac's law is defined as a gas law which states that the pressure which is exerted by the gas is directly proportional to  temperature and at a constant volume.The law was proposed by    the scientist named Joseph Gay-Lussac in the year 1808.

The pressure of the gas at constant volume reduces constantly at a rate  as  the gas is cooled till it undergoes condensation .

It is given by the formula, P₁/T₁=P₂/T₂ substitution of values  in the formula gives P₂=3×546/273=6 atmospheres.

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To solve this we must be knowing each and every concept related to  landslides. Therefore, the given process describe the landslides process.

Slope collapses are essentially natural calamities that occur in a variety of locations across the world. Slope failures, often known as landslides, define a wide range of mechanisms that produce the outward or downward of slope-forming materials such as rock, soil, or landfills.

The down-slope movement of material on Earth is called a slope failure. It is the failure of the slope resulting in transport of debris downhill by sliding, rolling, falling, or slumping. This is an example of slope failure called landslides.

Therefore, the given process describe the landslides process.

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Explanation:

The graphite anodes are suspended into the brine. During electrolysis, Cl ions are oxidized at the anode and chlorine gas goes out of the cell, while sodium ions are reduced at the mercury cathode forming sodium amalgam. ... Hydrogen gas is obtained as a by–product at the cathode.

The temperature range for which this reaction is spontaneous is 5191.76°C.

To determine the temperature range for which this reaction is spontaneous, we can use the Gibbs free energy equation:
ΔG = ΔH - TΔS

where ΔG is the change in Gibbs free energy, ΔH is the change in enthalpy, ΔS is the change in entropy, and T is the temperature in Kelvin.

For a spontaneous reaction, ΔG must be negative. We know that ΔH = -623 kJ/mol and ΔS = -114 J/mol-K. We need to convert ΔH to J/mol, so we have:
ΔH = -623,000 J/mol

Substituting the values into the equation and solving for T, we get:
ΔG = ΔH - TΔS
-ΔG = TΔS - ΔH
T = (-ΔH) / ΔS
T = (-623,000 J/mol) / (-114 J/mol-K)
T = 5464.91 K

However, this temperature is far above normal laboratory conditions, so we need to convert it to Celsius.
T (°C) = T (K) - 273.15
T (°C) = 5464.91 K - 273.15
T (°C) = 5191.76°C

This temperature is unrealistic for this reaction, so we can conclude that this reaction is spontaneous at very high temperatures. In general, a reaction is spontaneous at high temperatures if the ΔH is negative and the ΔS is positive.

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In order to determine if a chemical hazard truly exists, there are several pertinent pieces of chemical information that must be considered. Firstly, the chemical composition of the substance in question must be examined, including its molecular formula and structural properties.

This information can help to determine the potential toxicity and reactivity of the chemical, as well as its potential routes of exposure (e.g. inhalation, ingestion, skin contact).

Additionally, data on the physical properties of the chemical - such as its melting point, boiling point, and solubility - can be important in determining how the substance may behave in different environments and under different conditions.

Finally, information on the potential environmental impact of the chemical, such as its persistence in the environment or its potential to bioaccumulate, can also be crucial in assessing the overall hazard posed by the substance.

By considering all of these factors together, a comprehensive picture of the potential hazards associated with a particular chemical can be developed, helping to inform appropriate risk management strategies and protective measures.

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The measure of the total energy radiated by a star in one second is called luminosity.

Luminosity represents the intrinsic brightness of a star and is a measure of the total power output in terms of energy. It is an important characteristic of a star that indicates its size and temperature.

Luminosity is typically expressed in units of watts or solar luminosities (the luminosity of our Sun). Flux, on the other hand, refers to the amount of energy received per unit area per unit time, and it is influenced by the distance between the star and the observer. Apparent magnitude and absolute magnitude are measures of a star's brightness as observed from Earth and at a standard distance, respectively, and they are related to luminosity but not the direct measure of energy radiated.

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The alpha isomer of a carbohydrate has the anomeric OH on the same side of the  \(CH_{2}OH\) group (option A).

The alpha isomer of a carbohydrate has A) The anomeric OH on the same side of the \(CH_{2}OH\) group. This configuration is what differentiates it from the beta isomer, which has the anomeric OH on the opposite side of the  \(CH_{2}OH\) group. This means that the hydroxyl group (-OH) attached to the anomeric carbon (the carbon that is bonded to two oxygen atoms) is on the same side as the  \(CH_{2}OH\) group in the cyclic structure of the carbohydrate. The beta isomer, on the other hand, has the anomeric OH on the opposite side of the  \(CH_{2}OH\) group (option B). If there is no anomeric OH group, then it is not a cyclic carbohydrate and is instead an open-chain form (option C).

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The volume of 0.255 M KOH solution required to neutralize a sample of sulfuric acid can be determined by stoichiometry and the balanced equation of the neutralization reaction.

In the balanced equation for the neutralization reaction between sulfuric acid (H2SO4) and potassium hydroxide (KOH), it is stated that 2 moles of KOH react with 1 mole of H2SO4 to produce 2 moles of water (H2O) and 1 mole of potassium sulfate (K2SO4). This means that the stoichiometric ratio between H2SO4 and KOH is 1:2.

To determine the volume of 0.255 M KOH solution required, you need the molarity and volume of the sulfuric acid solution. Let's assume you have the volume of sulfuric acid in liters (L).

According to the stoichiometry, 1 mole of H2SO4 reacts with 2 moles of KOH. Using the molarity and volume of KOH, you can calculate the number of moles of KOH required. Then, based on the stoichiometric ratio, you can determine the moles of H2SO4 present in the sample.

Finally, using the molarity of the sulfuric acid solution, you can calculate the volume of the solution required to neutralize the given sample. Remember to convert the volume from liters to the desired unit (e.g., milliliters) if needed.

Please provide the volume of the sulfuric acid solution in order to proceed with the calculation.

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Answer:

1=

25000 ml

2=

300 mm

3=

350m

Scientists use a star's color to calculate its temperature.

The color of a star is directly related to its temperature, with cooler stars appearing redder and hotter stars appearing bluer. By observing the color of a star, scientists can calculate its temperature and learn more about its properties and behavior.

The color of a star is determined by the blackbody radiation that it emits. The hotter the star, the more energetic the blackbody radiation it emits, which appears more blue. The cooler the star, the less energetic the blackbody radiation it emits, which appears more red.

By measuring the intensity of the radiation emitted at different wavelengths, scientists can determine the temperature of a star.

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Answer

We have the following chemical reaction:

We can see that the equation is balanced because we have the same number of each atom in both sides of the equation.

Now, as we can see in the equation, for every mol of Zn that reacts it is needed 2 moles of HCl. Therefore we can calculate the moles of HCl needed in total as follows:

So the answer is: there are needed 5.8 mol.

Answer:

its FALSE

Explanation:

FAKE   ITS NOT REAL

A person with a history of chemical dependency on controlled substances who desires to obtain A License. A license to practice Nursing students may be required to show proof of current sobriety and fitness to practice.

This rule is from the Texas Board of Nursing’s (BON) Administrative Rules. It is stated that any nurse who has a chemical dependency diagnosis or a history of controlled substance abuse must demonstrate the following through "objective, verifiable evidence" of current sobriety and fitness to practice to get a license.

This objective, verifiable evidence could be obtained through AA records, negative drug tests, an assessment by a specialist in addiction, and testimonies from group members, colleagues, and other close friends.

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