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2nd Semester Exam Review
Test Description: 2nd semester Exam Review
Instructions: Answer all questions to get your test result.
1) The actual yield of a product is
A
a negative value
B
independent of the reactants
C
measured experimentally
D
the same as the theoretical yield
2) Percent yield of a product is a measure of a reaction's
A
spontaneity
B
efficiency
C
heat production
D
rate
3) In a reaction, substances A and B form substance C. If the actual mole ratio of substance B to substance A is less than the balanced equation mole ratio of substance B to substance A, substance B is
A
product
B
excess reactant
C
limiting reactant
D
actual yield
4) Limiting a reactant is often accomplished by
A
overcoming conservation of mass
B
slowing down a chemical reaction
C
producing excess product
D
using an excess of another reactant
5) Calculating the mass of a reactant and product from the number of moles of another product or reactant in a chemical equation is an example of a
A
mass-to-mass conversion
B
mole-to-mole conversion
C
mole-to-mass conversion
D
mass-to-mole conversion
6) In the decomposition reaction of compound AB into substances A and B, what is the number of mole ratios?
A
6
B
9
C
1
D
3
7) Mole ratios for a reaction are obtained from the
A
periodic table
B
balanced chemical equation
C
molar masses
D
total mass of products
8) In a balanced chemical equation, the numbers of individual particles and the numbers of moles of particles are represented by the
A
coefficients
B
molar masses
C
chemical symbols
D
subscripts
9) Stoichiometry is based on the law of conservation of
A
reactants
B
mass
C
charge
D
volume
10) The SI unit of molar mass is the
A
mole/gram
B
mole
C
gram
D
gram/mole
*select an answer for all questions
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