4.
when 31.6 g mnxoy is heated with carbon then 13.2 g of co2 gas is produced then the formula
of mnxoyis
(a) mno
(b) mno2
(c) mn2o3
(d) mn2o5

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots

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.