Ammonium sulfate is a common component of fertilizer.Calculate it's formula weight.

Question

Quizplus · Accepted Answer

The formula of ammonium sulfate can be written as (NH4)2SO4. 
The formula weight is calculated by adding the atomic masses of all the atoms in the formula.

Atomic mass of nitrogen (N) = 14.01 amu 
Atomic mass of hydrogen (H) = 1.01 amu 
Atomic mass of sulfur (S) = 32.06 amu 
Atomic mass of oxygen (O) = 16.00 amu

Formula weight of (NH4)2SO4 = 2(NH4) + SO4 
= 2(N + 4H) + S + 4O 
= 2(14.01 + 4(1.01)) + 32.06 + 4(16.00) 
= 132.13 amu

Therefore, the correct answer is C.

Ammonium Sulfate Is a Common Component of Fertilizer