Chemistry
Grade-8
Easy

Question

The molecular weight of HNO3  is _________.

  1. 33 u
  2. 54 u
  3. 72 u
  4. 63 u

hintHint:

Molecular mass can be calculated by adding the atomic mass of all the elements individually.

The correct answer is: 63 u


    • Molecular weight is the mass of a particular molecule and is measured in Daltons.
    • The molecular mass of HNO= The atomic mass of hydrogen+ atomic mass of nitrogen + atomic mass of oxygen
    => (1x 1) + (1x 14) +(3x 16)=(1+14+48)
    =63 u

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