carbon dioxide (CO2) gas is produced as a result of the reaction between calcium carbonate and hydrochloric acid. The gas that is produced is collected in a 20 dm3 container. The pressure of the gas is 105 kPa at a temperature of 20 C. What mass of carbon dioxide was produced?

Answer 1

PV = nRT and solve for n = number of mols.
Then n = grams/molar mass. You know molar mass and n, solve for grams.