ar mg

First, compute the number of each atom in Ar(Mg): Ar: 1, Mg: 1. pyricef cefadroxil 500 mg obat apa Then, lookup atomic weights for each element in periodic table: Ar: 39. pyricef cefadroxil 500 mg obat apa 948, Mg: 24 305 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Ar(Mg)) = ∑ Count i * Weight i = Count(Ar) * Weight(Ar) + Count(Mg) * Weight(Mg) = 1 * 39 948 + 1 * 24 305 =