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Chem 120 Chapters 1 and 2 Exam Questions with Detailed Answers 2025

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Course CHEM 120
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Chemistry -Correct Answer study of matter and its properties Matter -Correct Answer "stuff of universe", anything that has mass and takes up space Examples of non-matter -Correct Answer light, heat, and sound Composition -Correct Answer what makes up matter, "the simpler substance" Element -Correct Answer basic material that cannot be broken down by chemical means Compound -Correct Answer chemical combination of two or more different elements Density formula -Correct Answer mass/volume LD50 value -Correct Answer median lethal dose, amount needed to kill 50% of a test population Precision -Correct Answer reproducibility, measurements close together

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CHEM 120



Chem 120 Chapters 1 and 2 Exam
Questions with Detailed Answers 2025
Chemistry -Correct Answer ✔study of matter and its properties


Matter -Correct Answer ✔"stuff of universe", anything that has mass and takes up
space


Examples of non-matter -Correct Answer ✔light, heat, and sound


Composition -Correct Answer ✔what makes up matter, "the simpler substance"


Element -Correct Answer ✔basic material that cannot be broken down by chemical
means


Compound -Correct Answer ✔chemical combination of two or more different
elements


Density formula -Correct Answer ✔mass/volume


LD50 value -Correct Answer ✔median lethal dose, amount needed to kill 50% of a
test population


Precision -Correct Answer ✔reproducibility, measurements close together



CHEM 120

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