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3 years ago

What is the amount of mass in each given unit of volume?

Chemistry

1 answer:

labwork [276]3 years ago

3 0

Answer:

Each volumn is different and therefore has a specific and unique mass.

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Calculate the percent yield when 500 grams of carbon dioxide react with an excess of water to produce 640 grams of carbonic acid

Elena-2011 [213]

Answer:

Percent yield = 90.5%

Explanation:

Given data:

Mass of carbon dioxide = 500 g

Mass of water = excess

Actual yield of carbonic acid = 640 g

Percent yield = ?

Solution:

Balanced chemical equation:

CO₂ + H₂O → H₂CO₃

Number of moles of carbon dioxide

Number of moles = Mass / molar mass

Number of moles = 500 g/ 44 g/mol

Number of moles = 11.4 mol

Now we will compare the moles of H₂CO₃ with CO₂.

CO₂ : H₂CO₃

1 : 1

11.4 : 11.4

Mass of carbonic acid:

Mass = number of moles × molar mass

Mass = 11.4 mol × 62.03 g/mol

Mass = 707.14 g

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield = 640 g/ 707.14 g × 100

Percent yield = 90.5%

7 0

3 years ago

Which of the following is an example of a negative tropism?

salantis [7]

C—stems and leaves growing upward?

7 0

3 years ago

A student is adding DI water to a volumetric flask to make a 50% solution. Unfortunately, he was not paying attention and filled

dalvyx [7]

Answer:

His results will be skewed because there was more water than stock solution. Which would cause the percentage solution to be less than 50% therefore the density would be less than the actual value.

Explanation:

The solution will have percentage less than that of 50%. Therefore the density would be less than the actual value.

Suppose there should be 50 mL of the solution, and he added 60 mL. So 10 mL of the solution is added more.

Suppose the mass of the solute is m.

Originally, the density is = $\frac{m}{50}$ $\left(\frac{\text{mass}}{\text{volume}}\right)$

Now after adding extra 10 mL , the density becomes $\frac{m}{60}$ .

Therefore, $\frac{m}{50}>\frac{m}{60}$

So the density decreases when we add more solution.

4 0

3 years ago

which process describe water changing from a liquid state to a gas? condensation evaporation infiltration precipitation

Bogdan [553]

<span>evaporation is the process that describe changing of water from liquid to gas</span>

8 0

3 years ago

Read 2 more answers

Which of the following elements has the highest ionization energy?

Sliva [168]

Answer:

It is Neon

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Explanation:

MY BRAIN :D

6 0

3 years ago