An element P combines with another element Q in the weight ratio 1: 5. If 15 g of P is made to react with 62g of Q to a compound. What will be the total weight of the new compound formed?
(A) 60 g
(B) 77 g
(C) 74.4 g
(D) 74 g
(E) 66 g

74.4 grams of the new compound will be formed.

The weight ratio at which the two elements P and Q combines is 1:5. So for every 1 gram of P there is 5 grams of Q.

Here we are supplied with 15 grams of P. So Q needed for 15 grams of P is 75 grams which we don't have.

We are given with 62 grams of Q. So P needed for that amount of Q is 12.4 grams.

Thus the compound will weigh grams which will give us with 74.4 grams of compound.

give me abc and i will get it for u.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.