Unit 9 Test – Chemistry I – Form A
DIRECTIONS: Solve the following problems. Show all of your work and circle your final
answer.
1.) What mass (in grams) of hydrogen gas is
produced if 20.0 moles of zinc are added to
excess hydrochloric acid according
to the following equation?
Zn (s) + 2 HCl (aq) à ZnCl2
(aq) + H2
(g)
2.) What mass (in grams) of 1 – chloropropane (C3H7Cl) is produced if
400. grams of propane
(C3H8) react
with excess chlorine gas according to the following equation?
C3H8 +
Cl2 à C3H7Cl + HCl
3.) What mass (in grams) of sodium hydroxide is
produced if 20.0 grams of sodium metal
reacts with excess water according
to the following chemical equation?
2 Na (s) + 2 H2O (l) à 2 NaOH (aq) + H2 (g)
SELECT THE BEST ANSWER AND
WRITE IT TO THE LEFT OF THE NUMBER OF THE QUESTION.
4.) For the reaction, 2 H2 + O2 à 2 H2O
, how many grams of water are produced from
6.00 moles of hydrogen?
(A) 2.00 g (B)
6.00 g (C) 54.0 g (D) 108 g
5.) For the reaction, 3 Fe
+ 4 H2O à Fe3O4 + 4 H2
, how many moles of iron oxide are
produced from 5.0 x 102
grams of iron?
(A) 1.0 mole (B)
3.0 moles (C) 9.0 moles (D) 12 moles
6.) For the reaction, CH4 + 2 O2 à CO2 + 2 H2O
, how many moles of carbon dioxide are
produced from the combustion of
100. grams of methane (CH4)?
(A) 6.23 moles (B)
10.8 moles (C) 12.5 moles (D) 25 moles
7.) For the reaction, Cl2 + 2 KBr à 2 KCl + Br2 , how many moles of potassium
chloride
are produced from 119 grams of
potassium bromide?
(A) 0.119 moles (B)
0.236 moles (C) 0.581 moles (D) 1.00 mole
8.) For the reaction, 2 H2 + O2 à 2 H2O
, how many moles of water can be produced from
6.0 moles of oxygen?
(A) 2.0 moles (B)
6.0 moles (C) 12 moles (D) 18 moles
9.) In the reaction, N2 + 3 H2 à 2 NH3
, what is the mole ratio of nitrogen (N2) to
ammonia (NH3)?
(A) 1 : 1 (B) 1 : 2 (C)
1 : 3 (D) 2 : 3
10.) In the reaction, 2 Al2O3 à 4 Al + 3 O2
, what is the mole ratio of aluminum to
oxygen?
(A) 10 : 6 (B) 3 : 4 (C)
2 : 3 (D) 4 : 3
11.) In the reaction, 2 H2 + O2 à 2 H2O
, what is the mole ratio of oxygen to water?
(A) 1 : 2 (B) 2 : 1 (C)
8 : 1 (D) 1 : 4
12.) In the reaction, Ca
+ Cl2 à CaCl2
, what is the mole ratio of chlorine to calcium
chloride?
(A) 2 : 3 (B) 2 : 1 (C)
1 : 2 (D) 1 : 1
13.) In the chemical reaction, w A + x B à y C + z D
, a comparison of the number of
moles of A to the number of moles
of C would be a(n)
(A) mass ratio (B) mole ratio (C) electron ratio (D)
energy proportion
14.) The Haber process for producing ammonia
commercially is represented by the equation,
N2 (g) + 3 H2 (g) à 2 NH3
(g). To completely convert 9.0 moles of
hydrogen gas to
ammonia gas, how many moles of
nitrogen gas are required?
(A) 1.0 moles (B) 2.0 moles (C) 3.0 moles (D) 6.0 moles
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