in the formula for two molecules of zinc nitrate, 2 Zn(NO3)2

Question

Its a counting elements and atoms assessment. Question is

In the formula for two molecules of zinc nitrate, 2 Zn(NO3)2, answer the following

Number of zinc atom

Answer 1

Hi Brianne,

If I understood the question correctly:

 

there is one zinc atom per molecule of zinc (ii) nitrate. We could also say there is one mole of zinc atoms per mole of Zinc (ii) nitrate. The large coefficient 2 in front of the formula denotes two molecules (or moles) of the compound, so the number of zinc atoms would double.