Answer:
122.13 g/mol
Step-by-step explanation:
To calculate the molar mass of a compound, you add up the atomic masses of all the individual atoms in the compound. Here's how you can calculate the molar mass of HC7H5O2:
Hydrogen (H) has a molar mass of approximately 1.01 g/mol.
Carbon (C) has a molar mass of approximately 12.01 g/mol.
Oxygen (O) has a molar mass of approximately 16.00 g/mol.
For HC7H5O2:
1 Hydrogen (H) atom: 1.01 g/mol
7 Carbon (C) atoms: 7 * 12.01 g/mol
5 Hydrogen (H) atoms: 5 * 1.01 g/mol
2 Oxygen (O) atoms: 2 * 16.00 g/mol
Now, add these masses:
1.01 + (7 * 12.01) + (5 * 1.01) + (2 * 16.00) ≈ 1.01 + 84.07 + 5.05 + 32.00 ≈ 122.13 g/mol
So, the molar mass of HC7H5O2 is approximately 122.13 g/mol.