The atomic mass of carbon is 12.01, sodium is 22.99, and oxygen is 16.00. What is the molar mass of sodium oxalate (Na2C2O4)?

Question

A.
134.00g
B.
133.00 g
C.
50.91 g
D.
66.91 g
E.
121.81 g

Answer 1

To calculate the molar mass of sodium oxalate (Na₂C₂O₄), we can break it down into its individual components:

1. Sodium (Na): There are 2 sodium atoms. $$2\times 22.99,\text{g/mol}=45.98,\text{g/mol}$$

2. Carbon (C): There are 2 carbon atoms. $$2\times 12.01,\text{g/mol}=24.02,\text{g/mol}$$

3. 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