Calculate the number of oxygen atoms in 0.10 mole of Na₂CO₃.10H₂O.

Calculate the number of gram atoms in 4.6 gram of sodium

What mass of Ca will contain the same number of atoms as are present in 3.2 g of S?

Calculate the number of atoms in each of the following:

(a) 52 moles of He

(b) 52 amu of He

(c) 52 g of He