How many grams of Magnesium are required to produce 40g... – Chemistry

Chemistryhard · Past Paper

How many grams of Magnesium are required to produce 40g of Magnesium Oxide ($MgO$)? (Mg=24, O=16)

A24g

B12g

C48g

D20g

✓ Correct Answer: A — 24g

Equation: $2Mg + O_2 \rightarrow 2MgO$. 48g Mg gives 80g MgO. Therefore, 24g Mg gives 40g MgO.

Share this question