Using Gas Volumes (T)

• What is the volume occupied by one mole of any gas at room temperature and pressure?

  24 decimeters cubed
• How can you calculate the volume of a gas from the number of moles?

  • Volume in decimeters cubed = Number of moles × 24
• If you have 3 moles of calcium carbonate, what volume of carbon dioxide will be produced?

  72 decimeters cubed
• What is the relationship between moles of calcium carbonate and moles of carbon dioxide produced?

  One mole of calcium carbonate produces one mole of carbon dioxide.
• How do you calculate the number of moles of a substance?

  The number of moles = Mass / Relative formula mass
• How many moles of calcium carbonate are in 300 g if its relative formula mass is 100?

  3 moles
• What volume of hydrogen gas is produced from 325 g of zinc?

  120 decimeters cubed
• What is the relative atomic mass of zinc used in the calculations?

  65
• How many moles of zinc are in 325 g?

  5 moles
• What is the process to calculate the volume of chlorine required to react with calcium?

  1. Calculate moles of calcium: Mass / Relative atomic mass
  2. Use the mole ratio from the reaction
  3. Calculate volume: Moles × 24
• If you have 80 g of calcium, how many moles do you have?

  2 moles
• How many moles of chlorine are needed to react with 2 moles of calcium?

  2 moles of chlorine
• What is the volume of chlorine required to react with 80 g of calcium?

  48 decimeters cubed
• What is the final step in calculating the volume of a gas produced in a reaction?

  • Multiply the number of moles by 24 to find the volume in decimeters cubed.
• What is the volume occupied by 1 mole of any gas at room temperature and pressure?

  24 dm³
• What are the standard conditions for temperature and pressure when calculating gas volumes?

  20 degrees Celsius and 1 atmosphere
• How do you calculate the volume of a gas from the number of moles?

  • Volume (dm³) = Number of moles × 24
• What is the formula to calculate the number of moles of a substance?

  Number of moles = Mass / Relative formula mass
• If you have 112 grams of nitrogen gas (N₂), how many moles do you have?

  4 moles
• What is the volume of 4 moles of nitrogen gas at room temperature and pressure?

  96 dm³
• How many moles are in 51 grams of ammonia (NH₃) with a relative formula mass of 17?

  3 moles
• What is the volume of 3 moles of ammonia gas at room temperature and pressure?

  72 dm³
• If you have 150 grams of ethane (C₂H₆) with a relative formula mass of 30, how many moles do you have?

  5 moles
• What is the volume of 5 moles of ethane gas at room temperature and pressure?

  120 dm³
• What is the process to calculate the volume of a gas from its mass?

  1. Calculate the number of moles using: Number of moles = Mass / Relative formula mass
  2. Calculate the volume using: Volume = Number of moles × 24