Question

find the volume of hydrogen gas (measured at room temperature and pressure) formed when 0.540g of calcium reacts with hydrochloric acid

Answer 1

Answer:

=0.3024dm³

Explanation:

moles of Calcium that reacted = mass of calcium÷ Molar mass

                                                  = 0.54/40

                                                  = 0.0135mol

From the equation, calcium and hydrogen gas are in a ratio of 1:1 hence, the amount of hydrogen formed is 0.0135mol

Volume= amount of substance × Molar volume of a gas

            = 0.0135mol ×22.4dm³

            =0.3024dm³