Question

calculate the number of atoms in 42g of carbon and 1.2g of calcium

Answer 1

42 grams of carbon contain (6.0225*10²³)/12 atoms
1.2 grams of calcium contain 1.2*1024 atoms

Answer 2

42 grams of carbon contain (6.0225*10²³)/12 atoms

1.2 grams of calcium contain 1.2*1024 atoms