Find % composition of (NH4)2 SO4
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You calculate the mass of each atom in a formula unit, divide by the formula mass, and multiply by 100 %.
See What does percent composition mean?
For calculation purposes, we can write the formula of (NH₄)₂S as N₂H₈S.
Mass of N = 2 atoms N × 14.01u1atom N = 28.02 u
Mass of H = 8 atoms H × 1.008u1atom H = 8.064 u
Mass of S = 1 atom S × 32.06u1atom S = 32.06 u
Mass of (NH₄)₂S = (28.01 + 8.064 + 32.06) u = 68.144 u
% S =28.02u68.144u × 100 % = 41.12 %
% H =8.064u68.144u × 100 % = 11.83 %
% N =32.06u68.144u × 100 % = 47.05 %
See What does percent composition mean?
For calculation purposes, we can write the formula of (NH₄)₂S as N₂H₈S.
Mass of N = 2 atoms N × 14.01u1atom N = 28.02 u
Mass of H = 8 atoms H × 1.008u1atom H = 8.064 u
Mass of S = 1 atom S × 32.06u1atom S = 32.06 u
Mass of (NH₄)₂S = (28.01 + 8.064 + 32.06) u = 68.144 u
% S =28.02u68.144u × 100 % = 41.12 %
% H =8.064u68.144u × 100 % = 11.83 %
% N =32.06u68.144u × 100 % = 47.05 %
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