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The molar mass of C16H10N2O2 is calculated by adding the atomic masses of each element, multiplied by their respective subscripts:
Carbon (C): 16 atoms
12.011 g/mol = 192.176 g/mol
Hydrogen (H): 10 atoms
1.008 g/mol = 10.08 g/mol
Nitrogen (N): 2 atoms
14.007 g/mol = 28.014 g/mol
Oxygen (O): 2 atoms
15.999 g/mol = 31.998 g/mol
Total molar mass = 192.176 + 10.08 + 28.014 + 31.998 = 262.268 g/mol