Question

Calculate the molar mass of ammonium sulfate ((NH4)2SO4), given that the atomic masses of nitrogen, hydrogen, sulfur, and oxygen are 14.01 g/mol, 1.01 g/mol, 32.06 g/mol, and 16.00 g/mol, respectively.

Answer 1

To calculate the molar mass of ammonium sulfate   NH4 2SO4 , we need to find the molar mass of each element in the compound and then add them together.Ammonium sulfate contains 2 nitrogen atoms, 8 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.Molar mass of nitrogen  N  = 14.01 g/molMolar mass of hydrogen  H  = 1.01 g/molMolar mass of sulfur  S  = 32.06 g/molMolar mass of oxygen  O  = 16.00 g/molNow, we will calculate the molar mass of each element in the compound:Molar mass of 2 nitrogen atoms  2N  = 2  14.01 g/mol = 28.02 g/molMolar mass of 8 hydrogen atoms  8H  = 8  1.01 g/mol = 8.08 g/molMolar mass of 1 sulfur atom  S  = 32.06 g/molMolar mass of 4 oxygen atoms  4O  = 4  16.00 g/mol = 64.00 g/molFinally, we will add the molar masses of all the elements to find the molar mass of ammonium sulfate:Molar mass of  NH4 2SO4 = 28.02 g/mol  N  + 8.08 g/mol  H  + 32.06 g/mol  S  + 64.00 g/mol  O  = 132.16 g/molThe molar mass of ammonium sulfate   NH4 2SO4  is 132.16 g/mol.