How many grams of water are needed to absorb 456 J if its temperature goes from 22.7 to 98.3 Celsius?

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

2. how is heavy water different from normal water

Which factor is likely to impact the possible number of compounds ?