Chemistry help on ?'s?

Question

Is it A B C D or E

These ?'s are not HW, its suppose to help me for the test, the #'s are going to b different but in the same format. so how do u solve them?

1) it would require ____ ml of 0.300 M hydrochloric acid solution to neutralize 30.0 ml of 0.300M sodium hydroxide solution

A 15,0

B 40.0

C 30.0

D 10.0

E 20.0

2) acid rain is a problem because ___

A it reacts with metals

B it reacts with marble

C it changes the pH of lakes

D nine of the above

E all of the above

3) If the oxidation number of an element changes from -1 to +1, the element has been reduced

A true

B false

Thanks a lot :)

Answer 1

1. C

2. E

3. B

good luck