Air

Question 1

What are the gases that make up air?

Answer 1

Nitrogen, Oxygen, Carbon Dioxide, Noble Gas, Water Vapor and others.

Question 2

How do you quantify the composition of a mixture of gas?

Answer 2

We use a value which is called the volume fraction of gases in the mixture.

Question 3

What is The Volume Fraction of a Gas?

Answer 3

A quantity that shows what part of the total volume of the mixture is occupied by a given gas.

Question 4

What is the composition of a 100 liters of air?

Answer 4

78 liters Nitrogen
21 Liters Oxygen
0.03 liters Carbon Dioxide
0.97 liters of Noble Gases

Question 5

How do you calculate the volume fraction of any of these gases in the air?

Answer 5

The volume of each gas should be divided by the volume of air.

Question 6

What is the formula to calculate Volume Fraction?

Answer 6

Volume Fraction = Volume of gas/ Volume of the mixture ; *100%

Question 7

Why must rooms where they are a lot of people be constantly ventilated?

Answer 7

This is because the air we exhale contains 16% oxygen, while the carbon dioxide percentage is 4%

Question 8

How would you calculate the volume of oxygen in 300 liters of air?

Answer 8

You multiply 300 liters by 0.21

Question 9

How would you calculate the volume of air required to obtain 7L of argon?

Answer 9

We divide the volume of argon (7 Liters) by 0.009 (the volume fraction of argon in 100 L of air)