Question

2.Calculate the relative molecular mass i) HCN​

Answer 1

Answer:

Molecular weight calculation:

1.00794 + 12.0107 + 14.0067

Percent composition by element

Element Symbol Atomic Mass # of Atoms Mass Percent

Hydrogen H 1.00794 1 3.730%

Carbon C 12.0107 1 44.442%

Nitrogen N 14.0067 1 51.828%

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Answer 2

Answer:

relative mass of H = 2

relative mass of C = 12

relative mass of N =14

relative molecular mass is 28

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