write the molecular formula for given compounds

Question

Write the molecular formula for given compounds and determine the amount of molecules present.

For each of the following, name the compound or write the molecular formula and determine how many grams of each you have.

9.24 x 10^-8 molecules N₂O₃

71.951 moles copper (I) sulfate

6.139 x 10¹⁷ moles Cr₂(SO₄)₃

2.3024 x 10²¹ molecules lead (II) cyanide

20.0481 moles C₂H₄O₂