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CHEM 120 Review Quiz Exam Study Guide Questions and Answers 2025

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Course CHEM 120
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What is a negative control? Group in which no response is expected This is the name of the variable in a scientific experiment that is controlled by the scientist Independent Variable You have a sample with a mass of 25 g and a volume of 2.8 ml. What is the density of this sample? 8.9 g/mL Which of the below subatomic particles has the lowest mass? electrons How many valence electrons are there in an atom of Neon? 8 How many pounds (lbs) are in 58 kg? 127.6 lbs Which atom would have an electron configuration of 1s2 2s2 2p6 3s23p6? Ar Determine how many electrons you would expect each of the following ions and ground state atoms to contain and match them up. a. Fluoride b. Fluorine c. Zn(I) d. Calcium ion

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CHEM 120



CHEM 120 Review Quiz Exam Study Guide
Questions and Answers 2025
What is a negative control?
Group in which no response is expected
This is the name of the variable in a scientific experiment that is controlled by the
scientist
Independent Variable
You have a sample with a mass of 25 g and a volume of 2.8 ml.
What is the density of this sample?
8.9 g/mL
Which of the below subatomic particles has the lowest mass?
electrons
How many valence electrons are there in an atom of Neon?
8
How many pounds (lbs) are in 58 kg?
127.6 lbs
Which atom would have an electron configuration of 1s2 2s2 2p6 3s23p6?
Ar
Determine how many electrons you would expect each of the following ions and
ground state atoms to contain and match them up.
a. Fluoride
b. Fluorine
c. Zn(I)
d. Calcium ion


CHEM 120

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