PLEASE HELP I WILL FAN AND MEDAL

7. which of the following is an example of a chemical change?
A. iron changing color when heated
B. gas bubbles forming in boiling water
C. balls of wax forming when melted wax is poured into ice water
D. a gas forming when vinegar and baking soda are mixed.

8. A substance that has high reactivity
A. easily combines chemically with other substances
B. burns in the presence of water
C. displaces dissolved oxygen
D. has a high boiling point

Question

PLEASE HELP I WILL FAN AND MEDAL

7. which of the following is an example of a chemical change?
A. iron changing color when heated
B. gas bubbles forming in boiling water
C. balls of wax forming when melted wax is poured into ice water
D. a gas forming when vinegar and baking soda are mixed.

8. A substance that has high reactivity
A. easily combines chemically with other substances
B. burns in the presence of water
C. displaces dissolved oxygen 
D. has a high boiling point

jabez177 · Answer

Medal* but okay. :) xD

bioepic · Answer

For the first one,  the answer would be D because that is the only one where a chemical reaction occurs

For the second question it is A because a reactive substance will combine chemically with others

anonymous · Answer

Thank you @BioEpic

bioepic · Answer

Mhm no problem!
Got more questions?

anonymous · Answer

Yes I do. would you care to help me?

anonymous · Answer

@BioEpic

bioepic · Answer

Sure, just post them as separate questions