Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.

QUESTION

# How can I find the percent composition of (NH4)2S?

You calculate the mass of each atom in a formula unit, divide by the formula mass, and multiply by 100 %.

See

For calculation purposes, we can write the formula of (NH₄)₂S as N₂H₈S.

Mass of N = 2 atoms N × (14.01"u")/(1"atom N") = 28.02 u

Mass of H = 8 atoms H × (1.008"u")/(1"atom H") = 8.064 u

Mass of S = 1 atom S × (32.06"u")/(1"atom S") = 32.06 u

Mass of (NH₄)₂S = (28.01 + 8.064 + 32.06) u = 68.144 u

% S =(28.02"u")/(68.144"u") × 100 % = 41.12 %

% H =(8.064"u")/(68.144"u") × 100 % = 11.83 %

% N =(32.06"u")/(68.144"u") × 100 % = 47.05 %