A 4.31 g sample of hydrated Na₂CO₃ is heated to remove the water (H₂O). The mass of the resulting anhydrous compound is 3.22 g. What is the formula of the hydrated compound?

The formula of the hydrated compound is Na₂CO₃⋅H₂O

4.92 g of hydrated magnesium sulfate (MgSO₄⋅nH₂O) was heated to remove the water, producing 2.40 g of anhydrous magnesium sulfate.

Work out the value of n.

The formula of the hydrated compound is MgSO₄⋅H₂O

3.74 g of hydrated copper sulfate is heated to form 2.39 g of anhydrous copper sulfate.

CuSO₄⋅nH₂O ➔ CuSO₄ + nH₂O

Work out the value of n.

The formula of the hydrated compound is CuSO₄⋅H₂O

A 1.20 g sample of hydrated tin chloride is heated, causing it to decompose and form 1.01 g of anhydrous tin chloride.

SnCl₂⋅nH₂O ➔ SnCl₂ + nH₂O

Calculate n.

The formula of the hydrated compound is SnCl₂⋅H₂O