Chemistry
Grade-9
Easy
Question
Calculate the percentage of nitrogen in calcium nitrate.
- 17
- 18
- 19
- 20
Hint:
Two nitrogen atoms are present in calcium nitrate.
The correct answer is: 17
Chemical formula of calcium nitrate is Ca(NO3)2.
Molecular mass of calcium nitrate is 164g. Atomic mass of nitrogen is 14g, two nitrogen atoms are present in calcium nitrate.
The percentage of nitrogen in calcium nitrate = (28
164)
100% = 17%
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