8) If the heat of combustion for a specific compound is -1140.0 kJ/mol and its molar mass is 33.43 g/mol, how many grams of this compound must you burn to release 959.10 kJ of heat?
The heat of combustion for a specific compound is -1140.0kJ/mole.
So, to release 959.10 kJ of heat we need (959.10 kJ)/(1140.0kJ/mole) = 0.8413 moles to be burnt.
Now, 1 mole of the compound weighs 33.43 g. So 0.8413 mole will have 0.8413*33.43 = 28.125 g of the compound.
So, to release 959.10kJ heat, we need to burn 28.125 g of the compound.
8) If the heat of combustion for a specific compound is -1140.0 kJ/mol and its molar...
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