Question

In a percentage composition investigation a compound was decomposed into its elements: 20.0 g of calcium, 6.0 g of carbon, and 24.0 g of oxygen. Determine the percentage composition of this compound

Answer 1

The percentage composition of this compound : 40%Ca, 12%C and 48%O

Further explanation

Given

20.0 g of calcium,

6.0 g of carbon,

and 24.0 g of oxygen.

Required

The percentage composition

Solution

Total mass of compound :

=mass calcium + mass carbon + mass oxygen

=20 g + 6 g + 24 g

=50 g

Percentage composition :

• Ca-calcium

$\tt \dfrac{20}{50}\times 100\%=40\%$

• C-carbon

$\tt \dfrac{6}{50}\times 100\%=12\%$

• O-oxygen

$\tt \dfrac{24}{50}\times 100\%=48\%$