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Chem 1020 - Exam 1 Review questions and answers graded A+ by experts 2024/2025 $9.99   Add to cart

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Chem 1020 - Exam 1 Review questions and answers graded A+ by experts 2024/2025

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Chem 1020 - Exam 1 Review questions and answers graded A+ by experts 2024/2025

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  • July 18, 2024
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  • 2023/2024
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Chem 1020 - Exam 1 Review

The scientific method emphasizes reason as the way to understand the world - ANSFalse

A scientific law is a brief statement that summarizes past observations and predicts future ones
- ANSTrue

Law of conservation of mass states... - ANSMass can neither be created or destroyed

Scientific theories are also called models - ANSTrue

Pure substance - ANSSubstances made of only one type of atom or only one type of molecule

Mixture - ANSA substance made of two or more different types of atoms or molecules

Element - ANSA substance that cannot be broken down into simpler substances (represented
by chemical symbols)

Compound - ANSA substance made of two or more elements in fixed proportions (represented
by chemical formulas)

Pure substances consist of... - ANSElements and compounds

Homogeneous mixture - ANSConsistent properties for a given sample

Heterogeneous mixture - ANSDoes NOT have consistent properties throughout

Examples of a homo mixtures? - ANSclean air, brass, bronze, steel

Examples of hetero mixtures? - ANSrocks, soil, pizza

Examples of pure substances? - ANSsugar, CO, nitrogen

Examples of mixtures? - ANSfog, tea, steam + water

Compounds can be... - ANSbroken down into elements by chemical reactions

Elements can NOT be... - ANSbroken down further by chemical reactions

Physical change - ANSInvolves changing the form but not the composition of a substance

Chemical change - ANSinvolves the change of composition of a substance

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