1. The reaction between magnesium and hydrochloric acid proceeds according to the equation:
Mg + 2HCl = MgCl2 + H2 ↑;
2.Calculate the chemical amount of reacted magnesium:
n (Mg) = m (Mg): M (Mg) = 20: 24 = 0.8333 mol;
3.determine the amount of hydrogen released as a result of the reaction:
n (H2) = n (Mg) = 0.8333 mol;
4.calculate the volume of hydrogen:
V (H2) = n (H2) * Vm = 0.8333 * 22.4 = 18.67 liters.
Answer: 18.67 liters.
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