Mg metal reacts with HCl to produce hydrogen gas.
Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)
What volume of hydrogen at 0 celsius and 1.00 atm (STP) is released when 5.55 g of Mg reacts?
How many grams of magnesium are needed to prepare 3.15 L of H2 at 730 mmHg and 26 celsius?