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

Answer 1

1 molar(no.of moles of solute per litre) Mg has
molarity=density/molar mass

density=molarity*molar mass
=1mol/l *24.3051 g/mol
=1/1000ml*24.3051 g/mol

calculate the actual density for 1mole in g/ml
for 1 mole of Mgo to be produced i need 1 mole of mg
so for that many grams of Mgo calculate the amount of 1M mg required by variation method
then for 1M density u require x g of Mg
so for 1.74g/ml how much?

Answer 2

try this method i am not very sure