Question

1. How many grams of iron (II) oxide can be produced from 3.4 g of iron in this balanced equation?

4Fe +3022Fe₂O3
2. How many grams of magnesium carbonate is produced from 6.7 g of magnesium oxide in this
balanced equation?
MgO + CO₂ → MgCO3
3. How many grams of calcium hydroxide is produced from 9.4 g of calcium chloride in this balanced
equation?
CaCl₂ + 2NaOH → 2NaCl + Ca(OH)2

Answer 1

3.12g FeO3

14.33g MgCO3

5.92g Ca(OH)2

Step-by-step explanation:

For the first problem, convert grams of Fe to mols of Fe.

molar mass of Fe: 55.845

Grams of Fe: 3.4g

3.4/55.845 = 0.06 mol Fe

There are 4 Fe for every 2 FeO3

So.. 0.06(2/4) = 0.03 mol FeO3

Multiply the mols by the molar mass of FeO3

Molar mass of FeO3: 103.845

0.03 * 103.845 = 3.12 g FeO3