How many milliliters of magnesium metal, with a density of 1.74 g/mL, are needed to produce 102.3 grams of magnesium oxide in the single-replacement reaction below? Show all steps of your calculation as well as the final answer

Mg + H2O → MgO + H2

Question

How many milliliters of magnesium metal, with a density of 1.74 g/mL, are needed to produce 102.3 grams of magnesium oxide in the single-replacement reaction below? Show all steps of your calculation as well as the final answer

Mg + H2O → MgO + H2

anonymous · Answer

moles MgO = 102.3 g/40.304 g/mol=2.54

the ratio between MgO and Mg is 1 : 1

moles Mg = 2.54

mass Mg = 2.54 mol x 24.305 g/mol=61.7 g

V = mass / density = 61.7 g/ 1.74 g/mL=35.5 mL