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Moles Produced from Heating

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1. How many moles of carbon dioxide will be produced if 50g of potassium hygrogen carbonate are heated?

2. Also, What is the mass of one nitrogen molecule (in grams). Do they mean N_2_?

Thanks! : )

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Coffee (Styrofoam) Cup Calorimetry

2 moles of a compound are allowed to react in a foam coffee cup that contains 160 grams of water. The reaction caused the temperature of the water to rise from 21 to 24.7 degrees Celsius. What is the enthalpy of this reaction? Assume that no heat is lost to the surrounding or to the coffee cup itself.

Please answer in kilojoules per mole of compound showing work

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