1pts steel wool wetted with vinegar is stuffed into a narrow mouth round glass bottle. a rubber balloon is then sealed over the mouth of the bottle. after several hours, the balloon inflates into the bottle in an inverted manner. what happened

Here's what I find  

Explanation:

The aqueous acid causes the iron to react with the oxygen in the air.

The reaction is probably

2Fe + O₂ + 4H⁺ ⟶ 2Fe²⁺ + 2H₂O

The removal of oxygen causes the pressure inside the bottle to decrease.

The greater outside pressure causes the balloon to inflate into the bottle in an inverted manner.  

5 structural isomers

the isomers are:

n-exane :   ch3ch2ch2ch2ch2ch3

2-methylpentane :   ch3ch(ch3)ch2ch2ch3

3-methylpentane :   ch3ch2ch(ch3)ch2ch3

2,3-dimethylbutane :   (ch3)2chch(ch3)2

2,2-dimethylbutane :   (ch3)3cch2ch3