If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 40.87 g/mol

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If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 40.87 g/mol

If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 40.87 g/mol, how many grams of this compound must you burn to release 568.30 kJ of heat?

mass: _______

science chemistry

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Answer 1

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Answer #1

Mol of compound burnt = heat / specific heat

= 568.30 KJ / 1170.0 KJ/mol

= 0.4857 mol

Now use:

Mass of compound = Mol of compound * molar mass

= 0.4857 mol * 40.87 g/mol

= 19.85 g

Answer: 19.85 g

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Answer 2

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If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 40.87 g/mol

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If the heat of combustion for a specific compound is -1170.0 kJ/mol and its molar mass is 40.87 g/mol

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