Examples (g-mol-atoms)
25.0 g Ca = ? mol = ? atoms
25.0g Ca
40.08g Ca
1 mol Ca
=
0.624 mol Ca
57.7 g S = ? mol S = ? atoms S
1.80 mol S
1.08 x 1024 S atoms
0.624 mol Ca
1 mol Ca
6.022 x 1023 atoms
=
3.76 x 1023 Ca atoms