NEW
Font size
S
M
L
XL
WorksheetsChemistry Sem Rev Practice Sp 1516 Stoichiometry
Total questions: 13
Worksheet time: 37mins
Name
Class
Date
1.
Molar masses are determined from
a)
the mole ratio of a given amount of reactant to an unknown amount of product
b)
the periodic table
c)
any mole ratio in the equation
d)
a conversion factor
2.
What is the mass of one mole of aluminum?
a)
26.982 g
b)
13 g
c)
53.985 g
d)
14 g
3.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
4.
Actual yield must be determined by
a)
experiments
b)
calculations
c)
theoretical yield
d)
estimation
5.
The limiting reactant
a)
slows the reaction down
b)
is used up first
c)
is the reactant that is left over
d)
controls the speed of the reaction
6.
What is the theoretical yield?
a)
the maximum amount of product from a reaction
b)
the amount of product recovered from a lab experiment
c)
amount of product that causes the reaction to stop
d)
the amount of product needed to reverse the reaction
7.
You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?
a)
bread
b)
jelly
c)
peanut butter
d)
sandwich
8.
Using the balanced equation in question 1,
Mg(s) + HCl(aq) --> MgCl₂(aq) + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?
Mg(s) + HCl(aq) --> MgCl₂(aq) + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?
a)
3.8 moles
b)
15 moles
c)
7.5 moles
d)
23 moles
9.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
10.
N2 + 3H2 −-> 2NH3
How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen?
How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen?
a)
6 moles Ammonium
b)
1.5 moles ammonium
c)
9 moles ammonium
d)
9 moles hydrogen
11.
Find the percent yield
2Fe2O3 + 3C −−〉 4Fe + 3CO2
38.1 g Fe2O3 −−〉 Fe
9.53 g C −−〉 Fe
Actual yield = 17.41
2Fe2O3 + 3C −−〉 4Fe + 3CO2
38.1 g Fe2O3 −−〉 Fe
9.53 g C −−〉 Fe
Actual yield = 17.41
a)
65.3
b)
29.4
c)
26.65
d)
59.14
12.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
13.
Karman ate lunch at a restaurant and the bill came to $8.99. She left a 20% tip, what was the total cost of her lunch?
a)
$7.19
b)
$1.80
c)
$179.80
d)
$10.79
Reset
