Mg + hcl → mgcl2 + h2 how many liters of hydrogen gas is produced at 298 k and 0.990 atm if 6.00 moles of hydrochloric acid react with an excess of magnesium metal?

74.04 liters of hydrogen gas is produced.

Explanation:

According to reaction, 2 mol of HCl gas gives 1 moles of hydrogen gas, then 6 moles of HCl gas will give: moles of hydrogen gas that is 3 moles.

Pressure of the hydrogen gas at 298 K = 0.990 atm

Volume occupied by the hydrogen gas = V

Number of hydrogen has moles = 3 moles

PV=nRT

V = 74.04 L

74.04 liters of hydrogen gas is produced.

the answer is b. dilution