Stoichiometry, Moles, and Molecular Weight

Problem:  How is the number of grams of a substance determined from its number of moles?
Answer:  Multiply the molar mass of the substance by the number of moles.

For 2.842 moles of nickel cyanide, C₂N₂Ni

1 mole of C₂N₂Ni = 110.73 grams C₂N₂Ni

(Calculation)

2.842 moles C₂N₂Ni X 110.73 grams C₂N₂Ni / 1 mole of C₂N₂Ni 

 = 314.7 grams of C₂N₂Ni