Question

How many atoms are in 7.12g of AuCl

Answer 1

Use the molar mass to convert to moles, then Avogadro's number to convert to molecules. And number of atoms in each molecule to convert to atoms. :)

Answer 2

Molar mass?

Answer 3

Right, from the periodic table. The molar mass of Au+ Molar mass of Cl

Answer 4

Molar mas s in grams/mol. So you can cancel out the grams and convert to moles.