To calculate the molar mass of sodium oxalate (Na₂C₂O₄), we can break it down into its individual components:
-
Sodium (Na): There are 2 sodium atoms. \[ 2 \times 22.99 , \text{g/mol} = 45.98 , \text{g/mol} \]
-
Carbon (C): There are 2 carbon atoms. \[ 2 \times 12.01 , \text{g/mol} = 24.02 , \text{g/mol} \]
-
Oxygen (O): There are 4 oxygen atoms. \[ 4 \times 16.00 , \text{g/mol} = 64.00 , \text{g/mol} \]
Now, we add these values together to find the total molar mass of sodium oxalate: \[ \text{Molar mass of Na}_2\text{C}_2\text{O}_4 = 45.98 , \text{g/mol} + 24.02 , \text{g/mol} + 64.00 , \text{g/mol} = 134.00 , \text{g/mol} \]
Thus, the molar mass of sodium oxalate (Na₂C₂O₄) is 134.00 g/mol, so the correct answer is:
A. 134.00 g