
Chapter 7 and 10 Review
Authored by Barb Runyon
Chemistry
10th - 12th Grade
Used 7+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The substances that undergo change in a chemical reaction are called
reactants
products
coefficients
elements
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a compound, chemical energy is contained in the
nuclei of the atoms
unbonded electrons
bonds
movement of the electrons
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The chemical equation shows the reaction that produces water from hydrogen and oxygen
2H2 + O2 --> 2H2O + 483.6 kJ
Which BEST describes this reaction?
exothermic
endothermic
decomposition
single replacement
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many moles are in a 5.00 gram sample of copper?
0.0154 moles
0.0787 moles
12.7 moles
317 moles
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When radium-226 decays to form radon-222, the radium nucleus emits a(n)
alpha particle
beta particle
gamma ray
electron
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The half-life of a radioisotope is the amount of time it takes for
half the sample to decay
all the sample to decay
the age of an artifact to be calculated
detectable radiation to be absorbed by a sample
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these BEST describes the energy transformation involved in nuclear reactions
the energy released in nuclear reactions is small
the energy released in nuclear reactions is large
the energy required in nuclear reactions is small
the energy required in nuclear reactions is large
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