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WorksheetsStoichiometry Intro Review
Total questions: 10
Worksheet time: 42mins
Name
Class
Date
1.
Using the balanced equation in question 1, Mg(s) + HCl(aq) --> MgCl₂(aq) + H₂(g) How many grams of HCl are needed in the reaction with 2.50 moles of magnesium?
a)
5.00 g
b)
7.29
c)
182 g
d)
218 g
2.
What is the first thing you must do to solve a stoichiometry problem?
a)
Write a Balanced Equation
b)
Panic
c)
Write an Unbalanced Equation
d)
Ask for help
3.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
4.
2CO + O2 −-> 2CO2
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
a)
10
b)
20
c)
1
d)
5
5.
1Mg + 2H2O --> Mg(OH)2 + H2
What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?
a)
62.0 L
b)
0.12 L
c)
2.77 L
d)
1.15 L
6.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
7.
N2 + 3H2 → 2NH3
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
8.
In a laboratory situation, it is common to express the amounts of materials in all of the ways below except
a)
mL
b)
moles
c)
grams
d)
number of particles
9.
If 3.29 x 1023 atoms of potassium react with excess water, how many liters of hydrogen gas would be produced at STP?
2 K + 2 H2O --> 2 KOH + H2
2 K + 2 H2O --> 2 KOH + H2
a)
6L
b)
5L
c)
4L
d)
3L
10.
For the reaction represented by the equation 2KClO3→ 2KCl+3O2 how many grams of potassium chlorate are required to produce 160. g of oxygen?
a)
408 g KClO3
b)
804 g KClO3
c)
598 g KClO3
d)
There is not enough information.
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