(b)a total of 1 mole of benzene was in the flask. the heat of fusion of benzene is 30.3 cal/g. how much heat is liberated when the benzene freezes?

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ