Calculate the molar mass of the following.
1. B2O3
2. Na2B4O7
3. Mn3O4
4. CaC2O4
1. B2O3:
B - 10.81 g/mol
O - 16.00 g/mol
Molar mass of B2O3 = (2 x 10.81) + (3 x 16.00) = 27.62 + 48.00 = 75.62 g/mol
2. Na2B4O7:
Na - 22.99 g/mol
B - 10.81 g/mol
O - 16.00 g/mol
Molar mass of Na2B4O7 = (2 x 22.99) + (4 x 10.81) + (7 x 16.00) = 45.98 + 43.24 + 112.00 = 201.22 g/mol
3. Mn3O4:
Mn - 54.94 g/mol
O - 16.00 g/mol
Molar mass of Mn3O4 = (3 x 54.94) + (4 x 16.00) = 164.82 + 64.00 = 228.82 g/mol
4. CaC2O4:
Ca - 40.08 g/mol
C - 12.01 g/mol
O - 16.00 g/mol
Molar mass of CaC2O4 = 40.08 + (2 x 12.01) + (4 x 16.00) = 40.08 + 24.02 + 64.00 = 128.10 g/mol