Chemistry
Grade-8
Easy
Question
In the ammonia molecule, the mass ratio of Nitrogen to Hydrogen is equal to:
- 12 : 4
- 13 : 4
- 7: 3
- 14 : 3
Hint:
The ratio is between the atomic mass of the elements.
The correct answer is: 14 : 3
- The formula of ammonia is NH3. This means there is one atom of nitrogen and three atoms of hydrogen in ammonia.
- The atomic mass of nitrogen is 14g.
- The atomic mass of 3 atoms of hydrogen is 3g.
- The ratio will be =
- Therefore the ratio is 14:3.
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