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The heat given off by freezing 180 g of ice (MW 18.0 g/mole) was used to evaporate a sample of ammonia. The heat of fusion

The heat given off by freezing 180 g of ice (MW 18.0 g/mole) was used to evaporate a sample of ammonia. The heat of fusion of water is 6.010 kJ/mole and the heat of vaporization of ammonia (MW = 17.0 g/mole) is 23.4 kJ/mole. How many moles of ammonia evaporated?

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