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Chem 120 Final Exam Review Questions With Answers

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Exam (elaborations)

Chem 120 Final Exam Review Questions With Answers

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CHEM 120 Final Exam Review QUESTIONS WITH ANSWERS

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CHEM 120 Final Exam Review /\ /\ /\ /\ /\

QUESTIONS WITH ANSWERS /\ /\

significant figures - CORRECT ANSWERS ✔✔a digit that is either
/\ /\ /\ /\ /\ /\ /\ /\ /\ /\

reliably known or closely estimated
/\ /\ /\ /\

Significant Figure Rules - CORRECT ANSWERS ✔✔1. All non-zero
/\ /\ /\ /\ /\ /\ /\ /\ /\

digits are always significant
/\ /\ /\ /\

2. Zeroes between non-zero digits are always significant
/\ /\ /\ /\ /\ /\ /\ /\

3. Zeroes to left of first non-zero digit (either before or after
/\ /\ /\ /\ /\ /\ /\ /\ /\ /\ /\ /\

decimal point) are never significant
/\ /\ /\ /\ /\

4. Zeroes to the right of last non-zero digit
/\ /\ /\ /\ /\ /\ /\ /\ /\

a. after decimal point are always significant
/\ /\ /\ /\ /\ /\ /\

b. which are before decimal point are not significant
/\ /\ /\ /\ /\ /\ /\ /\ /\

conversion factor - CORRECT ANSWERS ✔✔relationship between /\ /\ /\ /\ /\ /\ /\

two quantities expressed as a fraction
/\ /\ /\ /\ /\

dimensional analysis - CORRECT ANSWERS ✔✔conversion of a /\ /\ /\ /\ /\ /\ /\ /\

measurement in one unit into another by the use of conversion /\ /\ /\ /\ /\ /\ /\ /\ /\ /\ /\

factors

True - CORRECT ANSWERS ✔✔T/F: number of protons never
/\ /\ /\ /\ /\ /\ /\ /\ /\

changes according to periodic table /\ /\ /\ /\

, number of protons - CORRECT ANSWERS ✔✔atomic
/\ /\ /\ /\ /\ /\ /\

number=_______________________

number of neutrons - CORRECT ANSWERS ✔✔mass
/\ /\ /\ /\ /\ /\ /\

number=_______________________

isotopes - CORRECT ANSWERS ✔✔atoms with same number of
/\ /\ /\ /\ /\ /\ /\ /\ /\

protons (same electron) but different number of neutrons
/\ /\ /\ /\ /\ /\ /\

atomic mass - CORRECT ANSWERS ✔✔weighted average of the
/\ /\ /\ /\ /\ /\ /\ /\ /\

isotopic masses of all stable isotopes of an element
/\ /\ /\ /\ /\ /\ /\ /\

compound - CORRECT ANSWERS ✔✔substance composed of 2+
/\ /\ /\ /\ /\ /\ /\ /\

elements that are chemically combined /\ /\ /\ /\

molecular compound - CORRECT ANSWERS ✔✔compound in
/\ /\ /\ /\ /\ /\ /\

which atoms are held together by covalent bonds
/\ /\ /\ /\ /\ /\ /\

ionic bond - CORRECT ANSWERS ✔✔nonmetal and metal (giving
/\ /\ /\ /\ /\ /\ /\ /\ /\

away of electrons by one and receiving by the other); electrostatic
/\ /\ /\ /\ /\ /\ /\ /\ /\ /\ /\

interactions between positive and negative ions /\ /\ /\ /\ /\

covalent bond - CORRECT ANSWERS ✔✔2 nonmetals (sharing of
/\ /\ /\ /\ /\ /\ /\ /\ /\

bonds); the sharing of electrons between two atoms
/\ /\ /\ /\ /\ /\ /\

ion - CORRECT ANSWERS ✔✔atom that has an electrostatic charge
/\ /\ /\ /\ /\ /\ /\ /\ /\

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