Question

What is the mass of 0.156 moles of limestone

Answer 1

Limestone = CaCO3

From periodic table:
Ca = 40.078 x (1) = 40.078g
C = 12.011 x (1) = 12.011g
O = 15.999 x (3) = 48g

Total = 100.089 grams

Now we are currently in moles of limestone, so in order to cancel out our units (Moles), we would have moles at the top.