If it takes 6.02 kj of heat energy to melt a mole of ice, how much heat is absorbed when 6.30 g of water melts? 21.0 j 2.10 kj 21 kj 0.210 kj

First, let's see how many moles correspond to 6.30 g of water.
The molar weight of water is 18.01 g/mol, so

Then we know it takes 6.02 kJ to melt 1 mole of ice, so if we have 0.35 mol, the amount of heat needed will be

2. they have negligible mass.

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