If you started with 7.461 g of magnesium metal, how much oxygen would be consumed during combustion?
A shade under
The amount of oxygen gas consumed is 4.911 g.
Start with a balanced equation.
The coefficient in front of each formula is its number of moles. No coefficient is understood to be 1. The mole ratio between magnesium and oxygen gas is
You will need the molar masses of magnesium and oxygen gas from the periodic table.
Oxygen gas (dioxygen):
First determine the moles of Mg in 7.461 g by dividing the 7.461 g by its molar mass.
Determine the moles
Determine the mass of