Chemistry Assessment

Need Help Choosing Which Chemistry Course to Take First?

We can help! Many students enroll in Chemistry 108, our introductory chemistry course. If you are already comfortable with the topics in Chemistry 108, you can take our chemistry assessment. Students who successfully complete the chemistry assessment and meet the math prerequisite are eligible to skip Chemistry 108 and enroll in Chemistry 120.

What Is the Chemistry Assessment?

The chemistry assessment is an optional test for students who wish to skip Chemistry 108. Eligible students can take this assessment once per term.

Eligibility for CHEM 120:

Completion of the Math placement
AND a passing score on the chemistry assessment (22 out of 44)

Assessment details:

Time limit: 50 minutes
44 multiple choice questions

Review Our Practice Test

The exam covers nine topic areas of general chemistry.

Self-guided tutorials can be found at and .

The exam covers nine topic areas of general chemistry:
- Compounds and Elements (3 questions)
- States of Matter (2 questions)
- Reactions (4 questions)
- Stoichiometry (6 questions)
- Structure of Matter (8 questions)
- Periodic Properties (3 questions)
- Solutions (6 questions
- Dynamics (2 questions
- Mathematics (10 questions)
1. An atom with an electron configuration of 1s2 2s2 2p3 has how many valence electrons?
  1. 2
  2. 3
  3. 4
  4. 5
  5. 7
2. The _________ sublevel of an atom has a total of five orbitals.
  1. s
  2. p
  3. d
  4. f
  5. g
3. You give a child a balloon, and he goes outside with it to play in the snow. Soon, he returns crying. What happened?
  1. The balloon expanded and burst.
  2. The balloon froze solid.
  3. The balloon shrank.
  4. The balloon dissolved.
  5. The child forgot Charles’ Law.
4. What kind of bonding occurs in the compound potassium oxide?
  1. ionic
  2. nonpolar covalent
  3. polar covalent (double bond)
  4. polar covalent (single bond)
  5. None of the above
5. A gas with a temperature of 21.0oC and a volume of 10.0 L is compressed to 5.00 L. What will be the new temperature?
  1. 10.5 oC
  2. 420. oC
  3. 42.0 oC
  4. –126 oC
  5. 315 oC
6. Which of the following sublevels does not exist as written?
  1. 3f
  2. 6f
  3. 2s
  4. 5d
  5. 8s
7. What is the molecular shape of PH3?
  1. tetrahedral
  2. trigonal planar
  3. bent
  4. linear
  5. trigonal pyramidal
8. What is the percent by mass concentration of sodium bromide in a solution which contains 50.0 g of sodium bromide in 200.0 g of water?
  1. 40.0 %
  2. 20.0 %
  3. 25.0 %
  4. 33.3 %
  5. 50.0 %
9. 9. How many milliliters of 6.00 M HCl solution would be required to prepare 2.00 L of 0.140 M HCl by dilution?
  1. 420 mL
  2. 168 mL
  3. 85.6 mL
  4. 46.7 mL
  5. 30.0 mL
10. What is the molar concentration of 2000. mL of aqueous solution containing 135 g of glucose, C6H12O6?
  1. 12.15 M
  2. 0.750 M
  3. 67.5 M
  4. 0.667 M
  5. 0.375 M
11. What is the formula of copper (II) sulfate pentahydrate?
  1. Cu2(SO4)2 . 5 H2O
  2. Cu2(SO4) . 5 H2O
  3. CuSO4 . 6 H2O
  4. CuSO4 . 5 H2O
  5. None of the above
12. What is the electron configuration for the nitride ion?
  1. 1s2 2s2 2p1
  2. 1s2 2s2 2p3
  3. 1s2 2s2 2p5
  4. 1s2 2s2 2p6
  5. None of the above
13. A tank has a pressure of 30.0 atm at a temperature of 22.0oC. After heating, the temperature rises to 35.0oC. What is the new pressure?
  1. 54.3 atm
  2. 31.3 atm
  3. 28.7 atm
  4. 47.7 atm
  5. 30.6 atm
14. Which pair is immiscible?
  1. ethanol and water
  2. water and octane, C8H18
  3. isopropyl alcohol and water
  4. acetic acid and water
  5. octane and oil
15. How many grams of sodium hydroxide are required to prepare 250.0 mL of a 6.00 M solution?
  1. 1.50 g
  2. 0.0375 g
  3. 0.600 g
  4. 3.75 g
  5. 60.0 g
16. 5.60 L of a gas at STP has a mass of 13.0 g. What is the molar mass of the gas?
  1. 33.2 g/mol
  2. 66.4 g/mol
  3. 26.0 g/mol
  4. 52.0 g/mol
  5. none of the above
17. What volume of 0.62 M sodium hydroxide is required to neutralize 20.00 mL of 0.391 nitric acid? Word reaction with reactants only. (Students should predict products): Sodium hydroxide + nitric acid
  1. 23.6 mL
  2. 16.9 mL
  3. 9.03 mL
  4. 11.8 mL
  5. none of the above
18. How many moles are in 20.0 g of sodium carbonate?
  1. 1.89 mol
  2. 212 mol
  3. 2.12 x 103 mol
  4. 0.189 mol
  5. 18.9 mol
19. The percent of nitrogen in magnesium nitride is
  1. 27.8%
  2. 36.6%
  3. 16.1%
  4. 72.2%
  5. 63.4
20. What is the molar concentration of 250. mL of aqueous solution containing 48.8 g of glucose, C6H12O6?
  1. 5.12 M
  2. 0.923 M
  3. 0.271 M
  4. 1.08 M
  5. 0.195 M
21. How many grams of aluminum metal will react with 0.0500 mole of oxygen gas according to the unbalanced equation given below?
  1. 1.35 g
  2. 1.01 g
  3. 4.32 g
  4. 2.06 g
  5. 1.80 g
22. For the equation given, how many grams of methane will react with 125 g of oxygen? Word reaction with reactants only. (Students should predict products): Methane (CH4) burns in oxygen
  1. 39.1 g
  2. 19.5 g
  3. 15.6 g
  4. 31.3 g
  5. 62.5 g
For problems 23 - 24, Given the word reaction with reactants only (students should predict products): phosphoric acid reacts with magnesium carbonate
1. From the balanced chemical equation the simplest whole number coefficient for the product magnesium phosphate is:
  1. 1
  2. 2
  3. 3
  4. 4
  5. none of the above
2. If 50.0 g of magnesium carbonate reacts completely with phosphoric acid, the grams of gas produced is
  1. 52.2 g
  2. 26.1 g
  3. 13.1 g
  4. 50.0 g
  5. 55.0 g
3. How many molecules are in 5.8 g of acetone, C3H6O?
  1. 0.10 molecules
  2. 6.0 x 1022 molecules
  3. 3.5 x 1024 molecules
  4. 6.0 x 1023 molecules
  5. none of the above
4. This reaction is an example of which of the following types? Aluminum reacts with bromine to produce aluminum bromide
  1. combination
  2. single displacement
  3. decomposition
  4. gaseous
  5. precipitation
5. What is the simplest whole number coefficient for aluminum bromide in the above reaction (#26)?
  1. 1
  2. 2
  3. 3
  4. 4
  5. none of the above
6. How many moles of oxygen are required for the complete reaction of 45g of C2H4 when it is burned?
  1. 1.3 x 102 mol
  2. 0.64 mol
  3. 112.4 mol
  4. 4.8 mol
  5. none of the above
7. If 14.0 g of C2H4 is burned and the actual yield of water is 7.84 g, the percent yield in the reaction is:
  1. 0.56%
  2. 43.6%
  3. 87.1%
  4. 56.0%
  5. 82.0%
Answers

1d 2c 3c 4a 5d 6a 7e 8b 9d 10e 11d 12d 13b 14b 15e 16d 17e 18d 19a 20d 21e 22d 23a 24b 25b 26a 27b 28d 29b

How Can I Take The Chemistry Assessment?

The chemistry assessment is offered on a drop-in basis at the Pleasant Hill Placement and Proctoring Center in SSC-140 (map).

The test is typically available to take Monday-Thursday, 9:30 a.m. - 3:30 p.m., and Friday, 9:30 a.m. - 11:30 a.m.

The assessment is not available on Fridays during the summer because the campus is closed.

Before you arrive:

Complete the online placement process for Math and English/ESL.
Call or email to verify availability on the date/time you wish to take the exam.
If you require extra time or other accommodations for a disability, please register with ��Vlog's Disability Support Services first.

What to bring:

Physical photo ID (driver's license, passport, student ID card, etc.)

Please note: ��Vlog does not release placement results to other schools.

Frequently Asked Questions

Still have questions? Learn more!

Check out our chemistry program page! You'll find the catalog, with descriptions of all our available chemistry courses.
The chemistry assessment may be taken once a term.
Children are not allowed in the Academic Proctoring Center and staff will not be able to watch any children while you are in the testing room. Please find other accommodations for your children while you are taking your exam.
Work with a counselor to make an educational plan based on your academic goals.

Contact Us

Placement & Proctoring Center

Pleasant Hill Student Services Center - SSC Room 140

Hours:

M T W Th 9:00 am - 5:00 pm

F 9:00 am - 3:00 pm

San Ramon West Building - W Welcome Desk / Front Counter

SRCProctoring@dvc.edu

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