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WorksheetsStoichiometry Basics
Total questions: 24
Worksheet time: 1hrs 3mins
Name
Class
Date
1.
How many particles are in 13.5 grams of Beryllium?
a)
1.5 particles
b)
9 particles
c)
4x1023 particles
d)
9x1023 particles
2.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2?
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
3.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6?
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)
124 g O2
d)
12.4 g O2
4.
4 Al + 3 O2 –> 2 Al2O3 How much 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
5.
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
a)
0.85 g
b)
290 g
c)
450 g
d)
870 g
6.
Using the following equation:
2I2(s) + KIO3(aq) + 6HCl(aq) --> 5ICl(aq) + KCl(aq) + 3H2O(l)
Calculate how many grams of iodine are needed to prepare 28.6 grams of ICl by this reaction.
2I2(s) + KIO3(aq) + 6HCl(aq) --> 5ICl(aq) + KCl(aq) + 3H2O(l)
Calculate how many grams of iodine are needed to prepare 28.6 grams of ICl by this reaction.
a)
17.88 g I2
b)
34.77 g I2
c)
29.50 g I2
d)
5.61 g I2
7.
C5H12O (l) combusts in air. How many grams of water are produced when 56.44 grams of C5H12O combusts?
a)
69.21 g H2O
b)
55.44 g H2O
c)
20.55 g H2O
d)
35.46 g H2O
8.
Using the following equation:
4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?
4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?
a)
45.08 g O2
b)
133.33 g O2
c)
260.77 g O2
d)
75.92 g O2
9.
How many moles are in 6x1022 particles of CO2?
a)
0.1 moles
b)
4.4 moles
c)
10 moles
d)
264 moles
10.
How many moles is 4 grams of Calcium?
a)
0.10 moles
b)
10 moles
c)
44 moles
d)
160 moles
11.
N2 + 3H2 −-> 2NH3
How many moles of hydrogen are needed to react with 1 mole of nitrogen?
How many moles of hydrogen are needed to react with 1 mole of nitrogen?
a)
3
b)
2
c)
1
d)
4
12.
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
13.
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
14.
In a Chemical Reaction, the Law of Conservation of Mass states?
a)
Matter is present.
b)
Matter is NOT created or destroyed.
c)
Matter is created and destroyed.
15.
What type of reaction is Cu + 2AgNO3 --> 2Ag + Cu(NO3)2 ?
a)
Synthesis
b)
Single Displacement
c)
Decomposition
d)
Double Displacement
16.
Theoretically, when does the Mass of Reactants = Mass of Products?
a)
Always
b)
Never
c)
Only under ideal conditions
d)
Only when pressure is conserved
17.
Theoretically, when does the Moles of Reactants = Moles of Products?
a)
Always
b)
Never
c)
Sometimes
d)
Only under ideal conditions
18.
What is the mass of one mole of aluminum?
a)
26.982 g
b)
13 g
c)
53.985 g
d)
14 g
19.
On the periodic chart, Ge and Sb are
a)
metals
b)
non-metals
c)
metalloids
d)
transition metals
20.
Why don't ionic compounds use prefixes in naming?
a)
To keep it simple.
b)
There is only one ratio in which the metal and non-metal can combine.
c)
False. Ionic compounds use prefixes.
d)
To confuse chemistry students.
21.
When naming an ionic compound, you
a)
name the non-metal first
b)
use prefixes to show the number of atoms
c)
name the cation (metal) first
d)
there is no set rule
22.
A charged particle containing more than one atom
a)
molecular formula
b)
polyatomic ion
c)
oxyanion
d)
interstitial alloy
23.
A chemical change happens when...
a)
a substance is changed at the atomic level
b)
bonds are broken and formed
c)
a new substance is made
d)
all of the above!
24.
When does a chemical reaction stop?
a)
When the lab is finished
b)
When we run out of one of the products
c)
When we run out of one of the reactants
d)
Chemical reactions never stop
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