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A farmer needs to deliver exactly 4.20 kg of nitrogen to a field…
Question
A farmer needs to deliver exactly 4.20 kg of nitrogen to a field using ammonium sulphate, (NH4)2SO4 (molar mass 132 g/mol; nitrogen atomic mass 14). Calculate the mass (in kg) of ammonium sulphate required.
✓ Verified answer: 19.8checked by our engine — not a guess
Step-by-step solution
Each formula unit of (NH4)2SO4 contains 2 N atoms = 28 mass units out of 132. Mass fraction of N = 28/132.
Mass of (NH4)2SO4 = required N / mass fraction = 4.20 / (28/132) = 4.20 x 132/28 = 4.20 x 4.7143 = 19.8 kg.
Final answer19.8
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