What is the molality of a solution that contains 70.5 g of KCl dissolved in 85.0 g of water?

In apex! a liquid heated beyond a certain temperature becomes

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?