The gram molecular weight (also known as molar mass) of C6H8O7 (citric acid) is 192.124 g/mol.

Here's how to calculate it:

* Find the atomic weights:

* Carbon (C): 12.011 g/mol

* Hydrogen (H): 1.008 g/mol

* Oxygen (O): 15.9994 g/mol

* Multiply each atomic weight by the number of atoms in the molecule:

* Carbon: 6 atoms * 12.011 g/mol = 72.066 g/mol

* Hydrogen: 8 atoms * 1.008 g/mol = 8.064 g/mol

* Oxygen: 7 atoms * 15.9994 g/mol = 111.996 g/mol

* Add up the results: 72.066 g/mol + 8.064 g/mol + 111.996 g/mol = 192.124 g/mol