Question

calculate the moles mass of the following substances :- 1).water (h2o) 2).HNO3 (nitric acid ) 3).Hcl(hydro chloric acid ) 4).C2H2 (ETHYNE)
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Answer 1

Answer:

(1) 18g/mol

(2) 63g/mol

(3) 36.5g/mol

(4) 26g/mol

Explanation:

Just add the atomic mass of particular atoms.

eg, H2O = (1)2 + 16

Atomic mass of H = 1, Atomic mass of O = 16

Hence you can solve others by yourself : Practice Makes Man Perfect.

By the way, some atomic masses you will helpful while solving these are : H= 1, C= 12, N= 14, O= 16, Cl= 35.5

Best of Luck

Answer 2

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