Convert the following units (Show Work Please)

Question

How many grams are in 5.12 moles of HCN?

Answer 1

Look up the atomic weights (in grams per mole) of H, C, and N in your chemistry book, and add them together.  That will be the molecular weight of HCN.  

 

Multiply the molecular weight of HCN by the given number of moles.  That will be the mass in grams of HCN.