Question

Berapa persentase (massa) nitrogen dalam ammonium Karbonat (NH₄)₂CO₃ ?

Answer 1

i HOPE YOU CAN UNDERSTAND THIS.
Mass of (NH4)2CO3= 2(14+4)+12+48= 36+12+48=96amu.
Mass of N in (NH4)2CO3= 2(14)= 28 amu

% percentage of N in ammonium carbonate= 28/96*100= 29.16%

Answer 2

Ar N = 14

H = 1

C = 12

O = 16

Mr (NH4)2CO3 = 2×N + 8×H + C + 3×O = 28 + 8 + 12 + 48 = 96

%N = massa N/Mr × 100%

= 28/96 × 100% = 29.17%