posted by catey on .
If the heat of combustion for a specific compound is -1460.0 kJ/mol and its molar mass is 55.75 g/mol, how many grams of this compound must you burn to release 900.20 kJ of heat?
1460 kJ/mol x ? mol = 900.25
Solve for ? mol and convert to grams by
g = mols/molar mass.