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WorksheetsLimiting reactants + volume of gas + Avogadro
Total questions: 28
Worksheet time: 47mins
Name
Class
Date
1.
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
2.
When 12 moles of O2 reacts with 1.1 mole of C10H8 what is the limiting reactant? C10H8 + 12 O2 --> 10 CO2 + 4 H2O
a)
Oxygen
b)
C10H8
c)
Water
d)
Carbon Dioxide
3.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Yield
4.
Read the following chemical formula: C6H12O6. How many hydrogen atoms are in the formula?
a)
12
b)
6
c)
4
d)
2
5.
Why is the following chemical equation not balanced?
H2 + O2 --> H2O
H2 + O2 --> H2O
a)
each side of the equation has a different number of oxygen atoms
b)
each side of the equation has a different number of hydrogen atoms
c)
each side has the same mass
d)
there are no coefficients
6.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
7.
What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O
4NH3+6NO --> 5N2 + 6H2O
a)
NH3
b)
NO
c)
N2
d)
water
8.
P4 + 3O2 --> P4O6
What is the limiting reactant is 12 moles of P4 react with 15 moles of O2?
What is the limiting reactant is 12 moles of P4 react with 15 moles of O2?
a)
P4
b)
O2
c)
P4O6
d)
none of the above
9.
3NH4NO3 + Na3PO4 --> (NH4)3PO4 + 3 NaNO3
Assuming we start with 30 g of NH4NO3 and 50 g of Na3PO4, identify the limiting reactant.
a)
ammonium phosphate
b)
sodium phosphate
c)
ammonium nitrate
d)
sodium nitrate
10.
3CaCO3 + 2FePO4 --> Ca3(PO4)2 + Fe2(CO3)3
Assuming we start with 100 g of CaCo3 and 45 g of FePO4, identify the limiting reagent.
a)
iron(V) phosphate
b)
calcium carbonate
c)
iron(III) phosphate
d)
calcium(II) carbonate
11.
What is the volume occupied by 1 mole of any gas at STP?
a)
44.8 L
b)
22.4 L
c)
16.8 L
d)
20.4 L
12.
What is the volume of 5 moles of oxygen gas at STP?
a)
112 L
b)
22.4 L
c)
78.8 L
d)
114.24 L
13.
How many moles are in a 18 L tank of nitrogen gas at STP?
a)
0.9 moles
b)
1 mole
c)
0.8 moles
d)
0.75 moles
14.
What is the volume of 3 moles of hydrogen gas at STP?
a)
22.4 L
b)
44.8 L
c)
67.2 L
d)
89.6 L
15.
What is Avagadro's number?
a)
6.02 X 10 24
b)
6.02 X 10 23
c)
6.02 X 10 22
d)
6.02 X 10 21
16.
Balance the following reaction:
Mg(s) + HCl(aq) --> MgCl₂(aq) + H₂(g)
Mg(s) + HCl(aq) --> MgCl₂(aq) + H₂(g)
a)
1,2,1,2
b)
2,1,1,2
c)
1,2,1,1
d)
1,2,2,2
17.
A mole of potassium chloride contains 6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
18.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
19.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
20.
What is the difference between a formula unit and a molecule?
a)
formula unit - ionic bond
molecule - covalent bond
molecule - covalent bond
b)
formula unit - big
molecule - small
molecule - small
c)
formula unit - covalent bond
molecule - ionic bond
molecule - ionic bond
d)
formula unit - small
molecule - big
molecule - big
21.
Fluorine is diatomic. What is the molar mass of fluorine gas?
a)
18.998 g/mol
b)
37.996 g/mol
c)
9 g/mol
d)
18 g/mol
22.
What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium with excfess water according to the following reaction?
1Mg + 2H2O --> Mg(OH)2 + H2
1Mg + 2H2O --> Mg(OH)2 + H2
a)
62L
b)
65L
c)
31L
d)
124L
23.
How do I move from grams to moles
a)
multiply by molar mass
b)
divide by molar mass
c)
multiply by Avo number
d)
divided by Avo number
24.
How do I change from moles to liters?
a)
divide by 22.4
b)
multiple by Avo number
c)
multiply by 22.4
d)
multiply by molar mass
25.
How many atoms are in a mole?
a)
6.022x10^23
b)
1
c)
Molar Mass
d)
22.4
26.
How many liters are in a mole?
a)
6.022x10^23
b)
1
c)
Molar Mass
d)
22.4
27.
How many grams are in a mole?
a)
6.022x10^23
b)
1
c)
Molar Mass
d)
22.4
28.
In the ideal gas law, _____ represents moles of a gas.
a)
T
b)
V
c)
R
d)
n
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