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Chem 1020 - Exam 1 Review.
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Chem 1020 - Exam 1 Review.
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Chem 1020 - Exam 1 ReviewThe scientific method emphasizes reason as the way to understand the world -
ANS-False
A scientific law is a brief statement that summarizes past observations and predicts
future ones - ANS-True
Law of conservation of mass states... - ANS-Mass can neither be created or destroyed
Scientific theories are also called models - ANS-True
Pure substance - ANS-Substances made of only one type of atom or only one type of
molecule
Mixture - ANS-A substance made of two or more different types of atoms or molecules
Element - ANS-A substance that cannot be broken down into simpler substances
(represented by chemical symbols)
Compound - ANS-A substance made of two or more elements in fixed proportions
(represented by chemical formulas)
Pure substances consist of... - ANS-Elements and compounds
Homogeneous mixture - ANS-Consistent properties for a given sample
Heterogeneous mixture - ANS-Does NOT have consistent properties throughout
Examples of a homo mixtures? - ANS-clean air, brass, bronze, steel
Examples of hetero mixtures? - ANS-rocks, soil, pizza
Examples of pure substances? - ANS-sugar, CO, nitrogen
Examples of mixtures? - ANS-fog, tea, steam + water
Compounds can be... - ANS-broken down into elements by chemical reactions
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