CHEM 1010 Final Exam Study Guide Questions and Complete Answers Graded A+

CHEM 1010 Final Exam Study
Guide Questions and
Complete Answers Graded
A+

1. Which of the following represents a physical change in matter?
a. a substance changes color when exposed to air
b. a substance produces a gas and a solid when heated
c. a substance burns when heated
d. a substance solidifies at 443 K Answer: d. a substance solidifies at 443 K
2. Which of the following terms correctly applies to a molecule of
CO2?
a. diatomic, heteroatomic
b. polyatomic, diatomic
c. triatomic, homoatomic
d. triatomic, heteroatomic Answer: d. triatomic, heteroatomic
3. Which of the following is an example of a homogenous mixture?
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, a. HCl solution
b. soil
c. vinegar and oil salad dressing
d. more than one response is correct Answer: a. HCl solution
4. Which number has the greatest number of significant digits?
a. 1.0035
b. 17.5000
c. 0.0000625
d. 6.022x10^23 Answer: b. 17.5000
5. If urine has a density of 1.08 g/mL, what would be the mass of a
125mL urine sample?
a. 135 g
b. 0.00864 g
c. 116 g
d. 125 g Answer: 135 g
6. How many electrons are in a neutral atom of carbon-13?
a. 12
b. 18
c. 6
d. no way to tell Answer: c. 6




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