Download Chem 101 Readiness Guide_2-09

CHEMISTRY 101 READINESS EXAM SAMPLE TEST
QUESTIONS
EAST LOS ANGELES COLLEGE
CHEMISTRY 101 READINESS EXAM GUIDE
-continued-
7.
For a chemical reaction it is usually found that the reaction rate is faster at
higher temperature. The rate increases because
READINESS EXAM PURPOSE
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(a) the concentrations of reactants increase
(b) more reactants collide with energy equal to or greater than the activation
energy
(c) the concentrations of products increase
(d) the volume expands and there is more room for new compounds
(products) to form
8.
Which answer is closest to the true value of the expression:
4
-5
Although students may be recommended for a chemistry course, students
will also need to clear the math prerequisite via appropriate satisfactory
course completion or acceptable level of skill as demonstrated in
the Math Assessment Placement Process.
-13
(9.1 x 10 )(1.1 x 10 )(log10 )(1000)
(a) 1.3
9.
(b) 13000
(d) 1.3 x 10-11
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Which substance does not obey the Lewis octet rule?
(a) N2
10.
(c) -13000
(b) NO
(c) CF4
(d) Ar
For the reaction at equilibrium:
2NO2(g)
2 NO(g) + O2(g)
which change will increase the amount of NO2(g)?
(a) remove NO gas
(b) add NO gas
(c) add catalyst
(d) remove O2 gas
11.
(a)
[CO2] [H2O]
[C6H6] [O2]
(b)
[CO2]12 [H2O]6
[C6H6]2 [O2]15
(c)
[C6H6] [O2]
[CO2] [H2O]
(d)
[12CO2] [6H2O]
[2C6H6][15O2]
6H2O(g)
CHEMISTRY 101 - General Chemistry I
Chemistry Prerequisite: Satisfactory completion of Chemistry 065 -orplacement into Chemistry 101, as demonstrated in the Chemistry 101 Readiness
Exam.
Math Prerequisite: Satisfactory completion of Math 125 - or- placement into
Transferrable Level Math or higher, as demonstrated in the Math Assessment
Placement Process.
Students with Disabilities: If a student has a verified learning or physical
disability, the student may contact the Disabled Students Program &
Services at (323) 265-8787, or visit their office (Building C2, Room 8),
to determine eligibility for alternative test-taking arrangements.
ANSWERS: 1 (d); 2 (a); 3 (d); 4(c); 5(b); 6(c); 7(b); 8(c); 9(b); 10(b); 11(b)
Rev. 2/18/09
Prerequisite Enforcement
Chemistry and Math prerequisites at East Los Angeles College are electronically
enforced. Participation in the Chemistry 101 Readiness Exam will recommend
the appropriate chemistry course; however the math prerequisites will also need
to be cleared via appropriate satisfactory math course completion or acceptable
level of skill as demonstrated in the Mathematics Assessment Placement
Process. Below are the respective recommended Chemistry courses and their
prerequisites.
CHEMISTRY 065 - Introductory General Chemistry
Math Prerequisite: Satisfactory completion of Math 115 -or- placement into
Math 125 or higher, as demonstrated in the Math Assessment Placement
Process.
For the reaction
2C6H6(g) +
15O2(g)
12CO2(g) +
the expression for the equilibrium constant, K, is
Chemistry Course Recommendation
The Chemistry 101 Readiness Exam acquaints students to the skills that are
needed to succeed in the general chemistry series and serves to identify those
students who are academically prepared for Chemistry 101. Some students
however, will need to improve their knowledge and will be recommended to
register for Chemistry 065.
NOTE: Chemistry Department advises Chemistry 101 Readiness Exam results
are valid for a one year period.
Chem 101
Rev. 2/18/09
Chem 101
CHEMISTRY 101 READINESS EXAM GUIDE
-continued-
EAST LOS ANGELES COLLEGE
CHEMISTRY 101 READINESS EXAM SAMPLE TEST
QUESTIONS
PREPARING FOR THE CHEMISTRY 101 READINESS EXAM
•
•
•
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Sample Tests:
Each student should review the following Chemistry 101 Readiness Exam
sample test materials, as provided, for preparation prior to taking the exam.
Exam Selection/ Calendar Review:
The Chemistry 101 Readiness Exam is offered on a First-Come, First-Serve
basis only. Space is limited to the first 30 students at the Main-Campus and 50
students at South Gate Educational Center. Review the Chemistry 101
Readiness Exam Calendar and attend a scheduled date & time of choice.
Students are encouraged to arrive at least a half-hour prior to any scheduled
exam.
Date of Exam:
Plan on arriving at least a half-hour early, to the exam of choice. Main Campus
exams are held in Building F5, Room 106. South Gate Educational Center
exams are held in Room 120. You must remember to bring to the exam: proof
of Student I.D. Number, Photo I.D., two #2 pencils, a non-programmable
calculator and the issued Chemistry 101 Readiness Exam Calendar. Students
will have access to a Periodic Table during the exam. Students will be turned
away upon achieving capacity, late arrivals, and/or if the necessary documents
are not provided. (Programmable calculators will not be permitted during the
exam.)
1.
Chemistry:
Chemistry 101 Readiness Exam is a 45-minute exam. It consists of 44
questions based on high school chemistry and high school mathematics
including: elements and their properties, chemical formulas,
concentrations of solutions, gases, oxidation numbers, redox reactions,
and the concepts of acids and bases.
Rev. 2/18/09
The correct formula for aluminum nitrate is
(a) Al3 N2
2.
(c) Al(NO2)3
(d) Al(NO3)3
A substance releases heat when it changes from
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) 36.0
(c) 81.0
(d) 162g
4.
Which element has exactly five electrons in the highest principal energy level
(the outer shell)?
(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) 500 L
Chem 101
(b) Al3 (NO3)
(a) liquid to solid
(b) solid to gas
(c) liquid to gas
(d) solid to liquid
Chemistry 101 Readiness Exam Duration:
Allow a total of 1 hour for the Chemistry 101 Readiness Exam.
READINESS EXAM COMPONENT
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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 exam.
Rev. 2/18/09
(b) 5.0 L
(c) 500 mL
(d) 0.75 L
Chem 101