Multiple Choice
What is the mass-volume percent (m/v %) of a solution containing 29.0 g of calcium sulfate dissolved in 103 mL of solution?
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3. Chemical Reactions
Mass Percent
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Which of the following best describes what mass measures in chemistry?
A
The number of atoms in a molecule
B
The amount of matter in a substance
C
The energy stored in chemical bonds
D
The volume occupied by a substance
Verified step by step guidance1
Understand that in chemistry, mass is a measure of the amount of matter present in a substance.
Recognize that mass is different from the number of atoms, which counts particles, not the total matter.
Note that energy stored in chemical bonds relates to chemical energy, not mass.
Realize that volume measures the space a substance occupies, which is different from mass.
Conclude that the best description of mass is 'the amount of matter in a substance' because mass quantifies how much material is present regardless of its form.
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