1.

Find the molecular mass of(a) H2O(b) HNO3​

Answer»

ANSWER:

(a) The molecular MASS of water is:-

   relative mass of hydrogen=1u

   relative mass of oxygen=16u 

   ∴ (2 × Atomic mass of hydrogen) + (1 × Atomic mass of oxygen)

⇒ [2(1.0084) + 1(16.00 u)]

⇒ 2.016 u + 16.00 u

⇒18.016

⇒ 18.02 u

(B) molecular mass of hno3 is:-

   hydrogen=1u

   nitrogen=14u

    oxygen=16u

    ∴(1 × Atomic mass of hydrogen) + (1 × Atomic mass of oxygen)+(3 × Atomic mass of oxygen)

⇒1+14+48

=63g/mol

Explanation:

Hope it helps!


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