How to Find the Volume of a Gas

• What equation links the volume of a gas to moles?

  Volume = moles × 24
• What is the volume of 3.5 moles of chlorine gas?

  84 decimeters cubed
• How do you find moles from 60 decimeters cubed of oxygen?

  60 ÷ 24 = 2.5 moles
• What is the first step to find the volume of 27 grams of water vapor?

  Find the moles using mass and MR
• What is the relative formula mass (MR) of water (H2O)?

  18
• How do you calculate moles from 27 grams of water vapor?

  27 ÷ 18 = 1.5 moles
• What is the volume of 1.5 moles of water vapor?

  36 decimeters cubed
• What is the limiting reagent in the reaction with excess hydrogen?

  Nitrogen is the limiting reagent
• How many moles of nitrogen are in 18 decimeters cubed?

  0.75 moles
• What is the molar ratio of nitrogen to ammonia?

  1:2
• How many moles of ammonia are produced from 0.75 moles of nitrogen?

  1.5 moles of ammonia
• What volume of ammonia is produced from 1.5 moles?

  36 decimeters cubed
• What is the molar ratio between nitrogen and hydrogen?

  1:3
• How much hydrogen reacts with 4 decimeters cubed of nitrogen?

  12 decimeters cubed
• When does the equation with the number 24 apply?

  At room temperature and pressure
• What happens to gas volume with changing temperature or pressure?

  It changes the volume occupied by gas
• What is the only equation needed for gas volume in exams?

  Volume = moles × 24