A hydrate of cocl2 with a mass of 6.00 g is heated strongly. after cooling the mass of the a hydrate is 3.27g. how many grams of h20 were lost from the hydrate?

The term hydrate would mean that the compound contains water molecules. When this compound is heated, the water molecules are lost first which means that what remains would be the dried compound. Therefore, the H2O lost from the hydrate would be 6.00g - 3.27g = 2.73 g.