I need help with chemistry homework! 10 POINTS

I need help on how to solve these 2 problems. It has to do with mols.Please show your work too.
- 47.2g MO=? atoms MO
- 275.9L He=? g He

47.2 g Mo * (1 mol Mo / 95.94 g Mo)= 0.492 mol Mo * (6.02*10^23 atoms / mol) = 2.96 * 10^(23) atoms Mo

275.9 L He * (1 mol He / 22.4 L He)= 12.32 mol He * (4 g He / mol He)=49.28 g He