jika dalam 200 gram pupuk urea terdapat 40 gram karbon,maka kadar karbon dalam pupuk urea adalah?

Kategori Soal: Kimia - Kadar Zat dalam SenyawaKelas: X SMAPembahasan:
Urea / CO(NH2)2 = CON2H4
Mr CON2H4 = 1 × Ar C + 1 × Ar O + 2 × Ar N + 4 × Ar HMr CON2H4 = 1 × 12 + 1 × 16 + 2 × 14 + 4 × 1Mr CON2H4 = 12 + 16 + 28 + 4Mr CON2H4 = 60
% C = Ar C / Mr CON2H4 × 100%% C = 12 / 60 × 100%% C = 20