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Chemistry 2nd Semester Review 2
Test Description: Chemistry semester review 2
Instructions: Answer all questions to get your test result.
1) As a hydrated compound is heated, it decreases in
A
brightness
B
color
C
temperature
D
mass
2) One mole of silicon has a mass of 28.086 g, and one mole of carbon has a mass of 12.011 g. What is the mass of one mole of silicon carbide (SiC)
A
40.097 g
B
2.340 g
C
16.075 g
D
3.3734 x 10 2 g
3) Methane (CH4) contains 75% Carbon. What percentage of methane is hydrogen?
A
6%
B
25%
C
33%
D
4%
4) Which compound has the smallest molar mass?
A
CO
B
H2O2
C
CO2
D
H2O
5) Sodium bromide dihydrate is correctly written as
A
NaBr.2H2O
B
(NaBr)2.H2O
C
NaBrH2
D
NaBr.(HO)2
6) Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titatnium
A
1 mol Ti/ 47.97 g Ti
B
47.87 g Ti/1 mol Ti
C
47.87 mol Ti/ 1 g Ti
D
1 g Ti/ 47.87 mol Ti
7) A _______ is a ratio between the number of moles of any two substances in a balanced chemical reaction
A
mole ratio
B
percent yield
C
theoretical yield
D
stoichiometry
8) The amount of product actually produced by a chemical reaction is called the
A
actual yield
B
limiting reactant
C
theoretical yield
D
percent yield
9) The reactant that limits the extent of the reaction is called
A
limiting reactant
B
theoretical yield
C
excess reactant
D
actual yield
10) In the formation of a covalent bond, electrons are
A
gained
B
lost
C
shared
D
transferred
*select an answer for all questions
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