Which pair of compounds are isomers?
(1) no2 and n2o4
(2) p2o5 and p4o10
(3) hcooh and ch3cooh
(4) ch3och3 and c2h5oh

and

Explanation: The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.

and are functional isomers which have same molecular formula but different functional groups attached.

(1) and are different compounds.

(2)   and are different compounds.

(3) and are different compounds.

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation: