A compound is formed when 0.3 moles of barium combine with a 0.6 moles of chlorine. What is the empirical formula for this compound?

Answer 1

The empirical formula is the formula with the lowest number of whole number moles.

Here we have 0.3 mol Ba and 0.6 mol Cl. Divide both by 0.3 to get whole numbers and we have...

1 mol Ba

2 mol Cl

Empirical formula = BaCl₂