Use of amount of substance in relation to volumes of gases

Question 1

Under what conditions do equal amounts in moles of gases occupy the same volume?

Answer 1

Under the same conditions of temperature and pressure.

Question 2

What is the volume of one mole of any gas at room temperature and pressure (20°C and 1 atmosphere pressure)?

Answer 2

24 dm?.

Question 3

What is the volume of one mole of any gas at room temperature and pressure (20°C and 1 atmosphere pressure)?

Answer 3

24 dm?.

Question 4

How can you calculate the volume of a gas at room temperature and pressure from its mass and relative formula mass?

Answer 4

You can calculate it using its mass and relative formula mass.

Question 5

What additional skill should students develop?

Answer 5

They should be able to change the subject of a mathematical equation.

Question 6

What mathematical skills are necessary for these calculations?

Answer 6

Recognizing and using expressions in decimal form, using ratios, fractions, and percentages, changing the subject of an equation, and substituting numerical values into algebraic equations with appropriate units for physical quantities.