How
many moles of hydrogen sulfide are contained in a 35.0 g sample
of this gas?
(A)
1.03 mol
(B)
2.06 mol
(C)
6.18 mol
(D)
9.45 mol
(E)
11.3 mol
2.
What is
the molar mass of ethanol (C2H5OH)?
(A)
34.2
(B)
38.9
(C)
46.1
(D)
45.1
(E)
62.1
3.
Ammonia
can be produced by the reaction of nitrogen and hydrogen gas. Suppose
the reaction is carried out starting with 14 g of nitrogen and 15
g of hydrogen. How many grams of ammonia can be produced?
(A)
17.04 g
(B)
34.08 g
(C)
51.1 g
(D)
85.2 g
(E)
102 g
4.
How many
atoms of hydrogen are present in 12.0 g of water?
(A)
1.11023
(B)
2.01023
(C)
4.01023
(D)
8.01023
(E)
4.81024
5.
Which compound
contains the highest percent by mass of hydrogen?
(A)
HCl
(B)
H2O
(C)
H3PO4
(D)
H2SO4
(E)
HF
Statement I
Statement
II
6.
In a balanced equation, the number of moles
of each substance is equal.
BECAUSE
Once the limiting
reagent has been consumed, the reaction can no longer continue.
7.
A
hydrocarbon (a compound consisting solely of carbon and hydrogen)
is found to be 96% carbon by mass. What is the empirical formula
for this compound?
(A)
C2H
(B)
CH2
(C)
C3H
(D)
CH3
(E)
C4H
8.
An unknown
compound contains the elements C, H, and O. It is known to contain
48% C and 4.0% H by mass. The molar mass of this compound has been
determined in the lab to have a value of 200. The molecular formula
for this compound is
(A)
C2H3O2
(B)
C4H6O4
(C)
C4H4O3
(D)
C8H3O6
(E)
C8H8O6
9.
When
7.0 g of ethene (C2H4)
burns in oxygen to give carbon dioxide and water, how many grams
of CO2 are formed?
C2H4 +
3O22CO2 +
2H2O
(A)
9.0 g
(B)
22 g
(C)
44 g
(D)
82 g
(E)
180 g
10.
Consider
the reaction below. What mass of CF4 is formed
by the reaction of 8.00 g of methane with an excess of fluorine?
2CO2 +
2H2O
CF4(g) + 4HF(g)
