Question

An unknown compound has the following chemical formula:

Mg, C12
where x stands for a whole number.
Measurements also show that a certain sample of the unknown compound contains 4.3 mol of magnesium and 8.62 mol of chlorine.
Write the complete chemical formula for the unknown compound.

Answer 1

Answer: MgCl2

Explanation: The ratio of moles of Cl to Mg is 2 to 1 (8.62 mole Cl to 4.3 moles Mg). The empiracle formula is therefore MgCl2