Chemistry
Grade-8
Easy
Question
The molecular weight of HNO3 is _________.
- 33 u
- 54 u
- 72 u
- 63 u
Hint:
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 HNO3 = 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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