Question

Some of the fertilizers are sodium nitrate NaNO₃, ammonium sulphate (NH₄)₂SO₄ and urea CO(NH₂)₂. Which of these contains the highest percentage of nitrogen?

Answer 1

% of N in NaNO₃ = `14/85 xx 100 = 16.47%`

% of N in (NH₄)₂SO₄ = `28/132 xx 100 = 21.21%`

% of N in CO(NH₂)₂ = `28/60 xx 100 = 46.66%`

So, highest percentage of N is in urea.