Calculate the mass percent of chlorine in each compund?

Question

Calculate the mass percent composition of chlorine in each compound.

Express you answer in percent to four significant figures

Part A- CI2O

Part B- CI2O2

Part C- CIO2

Part D- CI2O5

Answer 1

I'll do A and B, and you should be able to do the others.

% Cl in each compound = mass of Cl / total mass (x100%)

A) Cl2O

mass of Cl = 2 x 35.5 g = 71 g

mass of O = 16 g

total mass = 0 + 16 = 87 g

% Cl = 71 g / 87 g (x100%) = 81.6% Cl

B) Cl2O2

mass of Cl = 2 x 35.5 = 71 g

mass of O = 2 x 16 = 32 g

total mass = 71 g + 32 g = 103 g

% Cl = 71 g / 103 g (x100%) = 68.9% Cl