Define formulae unit mass of compounds.Calculate the formula mass of NaCo3.10H2O and CuSo4
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it is the sum of the atomic masses of all atoms in a formula unit of a compound
NaCo3 = Na x 1 + C x 1 + O x 3
= 23 x 1 + 1 x 12 + 3 x 16
= 23 + 12+ 48
=83
H2O = H x 2 + O x 1
= 2 x 1 + 1 x 16
2 + 16
18
CuSo4 = 1 x Cu + 1 x S + 4 x O
1 x 63.5 + 1 x 32 + 4 x 16
63.5 + 32 + 64
159.3
NaCo3 = Na x 1 + C x 1 + O x 3
= 23 x 1 + 1 x 12 + 3 x 16
= 23 + 12+ 48
=83
H2O = H x 2 + O x 1
= 2 x 1 + 1 x 16
2 + 16
18
CuSo4 = 1 x Cu + 1 x S + 4 x O
1 x 63.5 + 1 x 32 + 4 x 16
63.5 + 32 + 64
159.3
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