Try It
After reviewing the information and lab activity presented in the lesson, answer the following questions about the conservation of matter and the lab you will be performing.
- Can atoms be created or destroyed in a chemical reaction?
a. Yes
b. No
c. Both of these
d. None of these
Answer: b. No
- What happens to atoms in a chemical reaction?
a. They rearrange to form new substances.
b. They are completely destroyed.
c. Both of these
d. None of these
Answer: a. They rearrange to form new substances.
- Why is it necessary to balance a chemical equation?
a. To ensure that the reactants have completely disappeared.
b. To ensure that the law of conservation of mass has been followed.
c. Both of these
d. None of these
Answer: b. To ensure that the law of conservation of mass has been followed.
- In trial 1 of the lab, the bottle will be put in a bowl on the scale or balance to deal with any spillage or foam overflow. Why is this important?
a. If you lose any part of the experiment, it would cause you to lose some mass and would affect your results.
b. If the experiment overflows the bottle, you'd have a really big mess to clean up.
c. Both of these
d. None of these
Answer: a. If you lose any part of the experiment, it would cause you to lose some mass and would affect your results.
- In trial 2 of the lab, why is it necessary to make sure the balloon is completely sealed over the mouth of the bottle?
a. The balloon might explode.
b. Some gas might escape the balloon which would cause your mass to be lower.
c. Both of these
d. None of these
Answer: b. Some gas might escape the balloon which would cause your mass to be lower.
Conclusion: You've completed this review of the conservation of matter lab activity in this lesson. If you had to try again on 2 or more questions, go back and review the lesson before continuing.