Clicker Questions
Clicker #1
To balance a chemical equation, it may be
necessary to adjust the
A. coefficients.
B. subscripts.
C. formulas of the products.
D. number of products.
Clicker #2
Prefixes are used in what kind of compounds?
A. metallic.
B. ionic.
C. covalent.
D. acidic.
Clicker #3
What would be the correct formula for aluminum
sulfate?
A.
B.
C.
D.
AlSO4
Al2SO4 3
Al3(SO4)2
Al2(SO4)3
Clicker #4
What would be the correct name for Al2S3?
A.
B.
C.
D.
Aluminum Sulfide
Aluminum (III) Sulfide
Diboron Trisulfide
None of the above
Clicker #5
What is the formula mass for iron (III) hydroxide?
A.
B.
C.
D.
73 amu
90 amu
107 amu
142 amu
Clicker #6
Which coefficients correctly balance the formula
equation CaCO3(s) → CaO(s) + CO2(g)?
A.
B.
C.
D.
1, 1, 1
1, 3, 1
2, 6, 3
3, 1, 2
Clicker #7
Which coefficients correctly balance the formula
equation NH4NO2 → N2 + H2O?
A.
B.
C.
D.
1, 2, 2
1, 1, 2
2, 1, 1
2, 2, 2
Clicker #8
Lead (III) chloride reacts with calcium hydroxide to
form calcium chloride and lead (III) hydroxide. What
are the coefficients for this reaction?
A.
B.
C.
D.
3, 2, 2, 3
2, 3, 2,2
2, 3, 3, 2
None of these
Clicker #9
What is the percent by mass of carbon in acetone,
C3H6 O?
A.
B.
C.
D.
20.7%
1.61%
30.0%
62.1%
Clicker #10
The lowest whole-number ratio of the elements in a
compound is called the ____.
A.
B.
C.
D.
binary formula
molecular formula
empirical formula
representative formula
Clicker #11
What would be the best name for Cr(OH)3?
A.
B.
C.
D.
Mono Chromium trioxide trihydride
Chromium (III) hydroxide
Chromium Trioxide Trihydride
Chromium Hydroxide
Clicker #12
Chemical equations must be balanced to satisfy
____.
A.
B.
C.
D.
the law of definite proportions
the law of multiple proportions
the law of conservation of mass
Avogadro’s principle
Clicker #13
Which of the following could be an empirical
formula?
A.
B.
C.
D.
N2O5
N2O4
N2H6
More than one could be an empirical formula
Clicker #14
If a compound has an empirical formula of COH2, has
a molecular weight equal to 60. g/mol, what is the
molecular formula?
A. C3O1H6
B. C2O2H4
C. C1O2H16
D. C3O3H6
Clicker #15
What is the formula for tetraphosphorus hexoxide?
A.
B.
C.
D.
4P7O
P4O6
P3O7
P4O7
Clicker #16
What is the formula for magnesium iodide?
A.
B.
C.
D.
MgI
MgI2
Mg2I
Mg2I2
Clicker #17
What would be the best name for K3PO4?
A.
B.
C.
D.
Potassium Phosphate
Potassium (I) Phosphate
Tripotassium Phosphate
Potassium Phosphide Oxide
Clicker #18
In every balanced chemical equation, each side of
the equation has the same number of ____.
A.
B.
C.
D.
coefficients
moles
molecules
atoms of each element
Clicker #19
Which coefficients correctly balance the formula
equation
Zn(OH)2 + CH3COOH → Zn(CH3COO)2 + H2O?
A.
B.
C.
D.
1, 2, 1, 1
2, 1, 2, 1
1, 2, 1, 2
2, 1, 1, 2
Clicker #20
What is the balanced equation when aluminum
reacts with copper(II) sulfate to produce aluminum
sulfate and copper?
A.
B.
C.
D.
Al + Cu2S →Al2S + Cu
2Al + 3CuSO4 → Al2(SO4)3 + 3Cu
Al + CuSO4 → AlSO4 + Cu
2Al + Cu2SO4 → Al2SO4 + 2Cu
Clicker #21
The percent composition of aluminum in aluminum
hydroxide is:
A.
B.
C.
D.
50%
25%
14%
None of the answers are correct
Clicker #22
N2S3 is properly named:
A.
B.
C.
D.
nitrogen sulfide
nitrogen (III) sulfide
nitrogen (II) sulfide
None of the answers are correct
Clicker #23
The red numbers in the image below represent
________
A.
B.
C.
D.
subscripts
Coefficients
I don’t know, and don’t want to try
None of the answers are correct
Clicker #24
The blue numbers in the image below represent
________
A.
B.
C.
D.
I don’t know, and don’t want to try
Coefficients
Subscripts
None of the answers are correct
Clicker #25
In a reaction in which hydrogen reacts with oxygen to
produce water, which substances are the
reactants?
A.
B.
C.
D.
hydrogen only
oxygen only
water
both hydrogen and oxygen
Clicker #26
11. How many atoms of oxygen are represented in
2Ca(NO3)2?
A.
B.
C.
D.
4
6
10
12