-45 = -9w PLS HEL its multipication btw

w=5 .

Step-by-step explanation: divide -9 on both sides which gives you 5 .So w=5 .

The diagram made by the student is correct.

Explanation:

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and for the reaction comes out to be negative.

Thus as X represents the potential energy of reactants and Y represents the potential energy of products, and X> Y, thus it is an exothermic reaction with