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Stoichiometry

Total questions: 10

Worksheet time: 30mins

Name
Class
Date
1.
What is the molar mass of C6H12O6?
a)

180.18 g/mol

b)

180.12 g/mol

c)

180.24 g/mol

d)

180.06 g/mol

2.

If you start with molecules of NaOH and you want to find the number of moles of NaOH, how many steps is it?

a)
1
b)
2
c)
3
d)
4
3.
Using the following equation:
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
4.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)

125 g O2

5.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
6.

4 Al + 3 O2 –> 2 Al2O How many mole of aluminum would be needed to completely react with 45 grams of O2?

a)
1.05 moles
b)
3.75 moles
c)
1.875 grams
d)
1.875 moles
7.
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
8.

2 CO (g) + O2(g) → 2 CO2 (g)
In the formation of CO2 from CO and oxygen, how many Liters of CO2 are produced by the reaction of 8 mols of O2 with an excess of carbon monoxide, at STP (Standard Conditions of Temperature and Pressure)?

a)
0.178 L
b)
358.4 Liters
c)
704 grams
d)
0.36 grams
9.

If you start with molecules of a compound "A" and you want to find the liters of a gas of a compound "B", how many steps is it?

a)

1

b)

2

c)

3

d)

4

10.

How many moles of CO2CO_2 are produced when 5.0 moles of C8H18C_8H_{18} are completely combusted in excess oxygen? (Balanced equation: 2C8H18+25O216CO2+18H2O2C_8H_{18} + 25O_2 \rightarrow 16CO_2 + 18H_2O )

a)

20 moles

b)

40 moles

c)

80 moles

d)

160 moles