Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?
Correct answer: B. 20
- A. 5
- B. 20
- C. 50
- D. 65
Explanation
Ammonium sulphate, (NH4)2SO4, contains two nitrogen atoms per molecular mass of about 132, giving 28/132 × 100 ≈ 21%. Thus the nearest option is 20%.
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