Answer:
D
Explanation:
I believe the answer is D.
Answer:
The amount/type of stain
Explanation:
You would want to ensure that the stain was the same in both samples.
Chemicals cancel each other out and produce a salt and water. A neutralization reaction my also occur
The opportunity costs of working part-time while attending high school could be studying time, grades, and your own free time. It depends on the person, how they do in school, but if it were for me, I would say the benefits outweigh the costs. I have enough time to study and still get good grades in school.
