CHEMISTRY 115 FINAL EXAM QUESTIONS WITH 100%
CORRECTLY SOLVED ANSWERS.
1) Any ionic compound containing group IA or NH4+ cations are.... -- Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _ _ _
Always Soluble _
2) Ionic compounds containing NO3-, NO2-, ClO3-, ClO4-, C2H3O2-, & HCO3-
_ _ _ _ _ _ _ _ _ _
anions are -- Answer ✔✔ Always Soluble
_ _ _ _ _ _
3) Ionic compounds containing Cl-, Br-, & I- anions are soluble EXCEPT when
_ _ _ _ _ _ _ _ _ _ _ _
combined with... -- Answer ✔✔ Ag, Hg, and Pb cations
_ _ _ _ _ _ _ _ _
4) Ionic compound containing SO4^2- are soluble EXCEPT when combined with... --
_ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ Ag, Hg, Pb, Ca, Sr, Ba
_ _ _ _ _ _ _
5) Ionic compounds containing So3^2-, S^2-, CO3^2-, PO4^3-, CrO4^2-, & CrO7^2-.
_ _ _ _ _ _ _ _ _ _
anions are insoluble EXCEPT when combined with.... -- Answer ✔✔ Group 1A or
_ _ _ _ _ _ _ _ _ _ _ _ _
NH4+ anions _
6) Ionic compounds containing O2- and OH- anions are INSOLUBLE except when
_ _ _ _ _ _ _ _ _ _ _
combined with... -- Answer ✔✔ group IA, NH4+, Ca, Sr, Ba
_ _ _ _ _ _ _ _ _ _
7) Chemistry -- Answer ✔✔ A science studying matters and their changes
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8) Matter -- Answer ✔✔ Anything that takes up space and has mass
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9) Physical change -- Answer ✔✔ Changes that occur without changing the objects
_ _ _ _ _ _ _ _ _ _ _ _
chemical make up. Example: water turning to ice
_ _ _ _ _ _ _
10) Chemical change -- Answer ✔✔ Changes that occur with modification of chemical
_ _ _ _ _ _ _ _ _ _ _ _
make up of substance, new stuff is made. Example: Rust
_ _ _ _ _ _ _ _ _
, 11) Intensive Property -- Answer ✔✔ Properties independent of the size of the sample.
_ _ _ _ _ _ _ _ _ _ _ _ _
Examples: Temperature, density. _ _
12) Extensive Property -- Answer ✔✔ Properties depends on the size of the sample.
_ _ _ _ _ _ _ _ _ _ _ _ _
Example: Mass, volume, energy _ _ _
13) Pure Substance -- Answer ✔✔ Substance that has fixed composition and a unique
_ _ _ _ _ _ _ _ _ _ _ _ _
set of properties. Can be elements, or compounds.
_ _ _ _ _ _ _
14) Mixture -- Answer ✔✔ Contains two or more pure substances
_ _ _ _ _ _ _ _ _
15) Homogeneous Mixture -- Answer ✔✔ uniform mixture with same composition
_ _ _ _ _ _ _ _ _ _
throughout
16) Heterogeneous Mixture -- Answer ✔✔ Mixtures with various composition. _ _ _ _ _ _ _ _ _
Example: salt and sugar mixture, can be picked apart
_ _ _ _ _ _ _ _
17) Exact Number -- Answer ✔✔ Value is exactly known, a counting definition, and has
_ _ _ _ _ _ _ _ _ _ _ _ _ _
no error/uncertainty
_
18) Measured Numbers -- Answer ✔✔ numbers without exactly known value due to
_ _ _ _ _ _ _ _ _ _ _ _
measuring process or device. Some error/uncertainty present.
_ _ _ _ _ _
19) 0 significance -- Answer ✔✔ 0 before first nonzero digit is never significant.
_ _ _ _ _ _ _ _ _ _ _ _
0 between nonzero digits ALWAYS significant
_ _ _ _ _
0 after last nonzero digit depends on decimal point
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20) Law of Mass Conservation -- Answer ✔✔ No detectable gain or loss of mass occurs
_ _ _ _ _ _ _ _ _ _ _ _ _ _
_in chemical reactions, mass is conserved
_ _ _ _ _
21) Law of Definite Proportion -- Answer ✔✔ In a given chemical compound, the
_ _ _ _ _ _ _ _ _ _ _ _ _
elements always combine in the same proportion of mass
_ _ _ _ _ _ _ _
CORRECTLY SOLVED ANSWERS.
1) Any ionic compound containing group IA or NH4+ cations are.... -- Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _ _ _
Always Soluble _
2) Ionic compounds containing NO3-, NO2-, ClO3-, ClO4-, C2H3O2-, & HCO3-
_ _ _ _ _ _ _ _ _ _
anions are -- Answer ✔✔ Always Soluble
_ _ _ _ _ _
3) Ionic compounds containing Cl-, Br-, & I- anions are soluble EXCEPT when
_ _ _ _ _ _ _ _ _ _ _ _
combined with... -- Answer ✔✔ Ag, Hg, and Pb cations
_ _ _ _ _ _ _ _ _
4) Ionic compound containing SO4^2- are soluble EXCEPT when combined with... --
_ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ Ag, Hg, Pb, Ca, Sr, Ba
_ _ _ _ _ _ _
5) Ionic compounds containing So3^2-, S^2-, CO3^2-, PO4^3-, CrO4^2-, & CrO7^2-.
_ _ _ _ _ _ _ _ _ _
anions are insoluble EXCEPT when combined with.... -- Answer ✔✔ Group 1A or
_ _ _ _ _ _ _ _ _ _ _ _ _
NH4+ anions _
6) Ionic compounds containing O2- and OH- anions are INSOLUBLE except when
_ _ _ _ _ _ _ _ _ _ _
combined with... -- Answer ✔✔ group IA, NH4+, Ca, Sr, Ba
_ _ _ _ _ _ _ _ _ _
7) Chemistry -- Answer ✔✔ A science studying matters and their changes
_ _ _ _ _ _ _ _ _ _
8) Matter -- Answer ✔✔ Anything that takes up space and has mass
_ _ _ _ _ _ _ _ _ _ _
9) Physical change -- Answer ✔✔ Changes that occur without changing the objects
_ _ _ _ _ _ _ _ _ _ _ _
chemical make up. Example: water turning to ice
_ _ _ _ _ _ _
10) Chemical change -- Answer ✔✔ Changes that occur with modification of chemical
_ _ _ _ _ _ _ _ _ _ _ _
make up of substance, new stuff is made. Example: Rust
_ _ _ _ _ _ _ _ _
, 11) Intensive Property -- Answer ✔✔ Properties independent of the size of the sample.
_ _ _ _ _ _ _ _ _ _ _ _ _
Examples: Temperature, density. _ _
12) Extensive Property -- Answer ✔✔ Properties depends on the size of the sample.
_ _ _ _ _ _ _ _ _ _ _ _ _
Example: Mass, volume, energy _ _ _
13) Pure Substance -- Answer ✔✔ Substance that has fixed composition and a unique
_ _ _ _ _ _ _ _ _ _ _ _ _
set of properties. Can be elements, or compounds.
_ _ _ _ _ _ _
14) Mixture -- Answer ✔✔ Contains two or more pure substances
_ _ _ _ _ _ _ _ _
15) Homogeneous Mixture -- Answer ✔✔ uniform mixture with same composition
_ _ _ _ _ _ _ _ _ _
throughout
16) Heterogeneous Mixture -- Answer ✔✔ Mixtures with various composition. _ _ _ _ _ _ _ _ _
Example: salt and sugar mixture, can be picked apart
_ _ _ _ _ _ _ _
17) Exact Number -- Answer ✔✔ Value is exactly known, a counting definition, and has
_ _ _ _ _ _ _ _ _ _ _ _ _ _
no error/uncertainty
_
18) Measured Numbers -- Answer ✔✔ numbers without exactly known value due to
_ _ _ _ _ _ _ _ _ _ _ _
measuring process or device. Some error/uncertainty present.
_ _ _ _ _ _
19) 0 significance -- Answer ✔✔ 0 before first nonzero digit is never significant.
_ _ _ _ _ _ _ _ _ _ _ _
0 between nonzero digits ALWAYS significant
_ _ _ _ _
0 after last nonzero digit depends on decimal point
_ _ _ _ _ _ _ _
20) Law of Mass Conservation -- Answer ✔✔ No detectable gain or loss of mass occurs
_ _ _ _ _ _ _ _ _ _ _ _ _ _
_in chemical reactions, mass is conserved
_ _ _ _ _
21) Law of Definite Proportion -- Answer ✔✔ In a given chemical compound, the
_ _ _ _ _ _ _ _ _ _ _ _ _
elements always combine in the same proportion of mass
_ _ _ _ _ _ _ _
