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Question
Calculate the molecular weight of Ca(NO3)2.
[At. wts. are O = 16, Ca = 40, N = 14]
Numerical
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Solution
Molecular weight = (At. wt. of Ca) + 2 × [(At. wt. of N) + 3 × (At. wt. of O)]
= 40 + 2 × [14 + 3 × 16]
= 40 + 2 × [14 + 48]
= 40 + 2 × [62]
= 40 + 124
= 164 amu
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