Frequently Asked Questions about the Chemistry Test
|Who may take the test?
||Students who want to place into CHEM& 161.
Additionally, students must have passed MATH& 141 or MATH& 148 with a grade of at least 2.0, or received a more advanced placement on the COMPASS math test.
|When can I test?
||Come to any COMPASS test session show on the testing calendar.
|How long will the test be?
|What is the test format?
||Paper/pencil, multiple-choice, 44 questions.
|What do I bring?
||Government-issued photo ID.
Receipt showing payment of the $19.00 fee.
No personal calculator allowed; TI-30XIIs is supplied.
No books or references allowed; a periodic table is supplied.
|How will I know if I passed?
||Students must score at least in the 60 percentile.
Come to Student Assessment Services office, RS 76,
or see your advisor for score results.
|Can I retest?
||This is a one-time only test. Review before testing.
|How can I prepare?
||Review areas of study below and try the sample questions.
Areas of Study
Structure of Matter
Atomic and Molecular Theory
Oxidation and Reduction
Qualitative Analysis and Organic Chemistry
California Chemistry Diagnostic Test Sample Questions
Competency areas: Compounds and elements; states of matter; reactions of matter;
structure of matter; periodic properties; solutions; qualitative kinetics and
thermodynamics; lab skills, mathematical skills. A Periodic Table is provided with the
Printable sample test with answer key
1. The correct formula for aluminum nitrate is
(a) Al3N2 (b) Al3(NO3) (c) Al(NO2)3 (d) Al(NO3)3
2. A substance releases heat when it changes from
(a) liquid to solid
(b) solid to gas
(c) liquid to gas
(d) solid to liquid
3. Given the balanced equation:
2H2(g) + O2(g) 2H2O(l)
How many grams of H2O are formed if 9.00 mol H2(g) reacts completely with an
excess of O2(g)? The molar mass of H2O is 18.0g/mol.
(a) 18.0g (b) 36.0g (c) 81.0g (d) 162g
4. Which element has exactly five electrons in the highest principal energy level (the
(a) Se (b) Ba (c) P (d) Ge
5. Which element is a metal?
(a) Se (atomic number = 34)
(b) Co (atomic number = 27)
(c) C (atomic number = 6)
(d) Br (atomic number = 35)
6. What volume of 1.5M NaOH is needed to provide 0.75 mol of NaOH?
(a) 500L (b) 5.0 L (c) 500 mL (d) 0.75 L
7. For a chemical reaction it is usually found that the reaction rate is faster at higher
temperature. The rate increases because
(a) the concentrations of reactants increase
(b) more reactants collide with energy equal to or greater than the activation
(c) the concentrations of products increase
(d) the volume expands and there is more room for new compounds (products) to
8. Which answer is closest to the true value of the expression:
(9.1 x 104)(1.1 x10-5)(log10-13)(1000)
(a) 1.3 (b) 13000 (c) -13000 (d) 1.3 x 10-11
9. Which substance does not obey the Lewis octet rule?
(a) N2 (b) NO (c) CF4 (d) Ar
10. For the reaction at equilibrium:
2 NO(g) + O2(g) 2 NO2(g)
which change will increase the amount of NO2(g)?
(a) remove NO gas
(b) add NO gas
(c) add a catalyst
(d) remove O2 gas
answers: 1d; 2a; 3d; 4c; 5b; 6c; 7b; 8c; 9b; 10b
Student Assessment Services, South Seattle Community College, 1/10/07; revised CCN, 4/08; fee increase; calc note: 6/2010