Question

Magnesium is heated in the presence of oxygen to produce magnesium oxide. If you started with 2.43g of magnesium, what is the theoretical yield of magnesium oxide?

Answer 1

4.05g of MgO

Step-by-step explanation:

Mg + O₂ → MgO

From the equation of reaction,

1 mole of Mg produces 1 mole of MgO

But 1 mole = molar mass

Molar mass of Mg = 24g/ mol

Molar mass of MgO = (24+16) = 40g/mol

From the equation of reaction,

24g of Mg reacts to produce 40g of MgO

2.43g of Mg will produce x g of MgO

X = (2.43 * 40) / 24

X = 97.2 / 24 = 4.05g of 4.05g

The theoretical yield of MgO is 4.05g