find the volume of the block : V = L x W x H
find the volume of the block : V = 4.00 x 4.00 x 1.00 = 16.00cm3
A cm3 is = to a ml
so the block has 16ml of iron so now to find its mass : M = D x V
Mass = 7.87 x 16 = 125.92g or 126g if rounded
hope that helps
