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3 years ago

I don’t know what the correct answer is? Can anyone explain?

Chemistry

2 answers:

Scorpion4ik [409]3 years ago

7 0

Short Answer:

Long Answer:

A- When a solid is heated, it melts and becomes a liquid. (Another older term is Fusion.) An example of this is ice to water when you leave it outside the freezer.

B- When a liquid becomes a gas, it undergoes a process called boiling. Example: When you boil water, it becomes steam.

C- It is called deposition. Example: How snow forms in clouds.

Lapatulllka [165]3 years ago

7 0

The correct answer is C

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A mixture of CO2 and Kr weighs 31.7 g and exerts a pressure of 0.665 atm in its container. Since Kr is expensive, you wish to re

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Answer:

11.94 grams of carbon dioxide were originally present.

19.94 grams of krypton can you recover.

Explanation:

Mass of carbon dioxide gas = x

Mass of krypton gas = y

x + y = 31.7 g

Moles of carbon dioxide gas = $n_1=\frac{x}{44 g/mol}=$

Moles of krypton gas = $n_2=\frac{y}{84 g/mol}=$

Mole fraction of krpton = $\chi '$

Total pressure of the mixture = P = 0.665 atm

Partial pressure of carbon dioxide gas = p

Partial pressure of krypton gas before removal of carbon dioxide gas = p'

Partial pressure of krypton gas after removal of carbon dioxide gas = p'' = 0.309 atm

p' = p'' = 0.309 atm

0.665 atm = p + 0.309 atm

p = 0.665 atm - 0.306 atm = 0.359 atm

Partial pressure of krypton can also be given by :

$p'=P\times \chi '$

$0.309 atm=0.665 atm\times \frac{n_2}{n_1+n_2}$

$0.309 atm=0.665 atm\times \frac{\frac{y}{84}}{\frac{x}{44}+\frac{y}{84}}$

$0.4645=\frac{\frac{y}{84}}{\frac{x}{44}+\frac{y}{84}}$ ..[2]

Solving [1] and [2]:

x = 11.94 g

y = 19.76 g

11.94 grams of carbon dioxide were originally present.

19.94 grams of krypton can you recover.

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2 years ago