Question

Calculate molecular mass of H2 and NH3 ( A + mass of H = 1 u, N = 14 u).

Answer 1

Explanation:

The atomic mass of nitrogen is 14u and hydrogen is 1u. The molecular mass of ammonia is calculated as 14u + 3(1) = 14 u + 3 u = 17 g/mol.

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Answer 2

➡H2

$2 \times 1$

$2$

➡NH3

$14(3 \times 1)$

$42$

Total mass

➡2+14

➡16g