Worksheets1.1 Mole concept.
Total questions: 15
Worksheet time: 23mins
Name
Class
Date
1.
When reaction is balanced, what is the coefficient in front of O2?
CH4 + O2 -> CO2 + H2O
CH4 + O2 -> CO2 + H2O
a)
1
b)
2
c)
3
d)
7
2.
What is the RMM of NaOH?
a)
23
b)
44
c)
40
d)
18
3.
The unit for molar mass is
a)
g/mol
b)
mol/g
c)
grams
d)
moles
4.
1 mol = ? g O2
a)
16
b)
32
c)
8
d)
24
5.
6.02 x 1023 is called
a)
Avocado
b)
Einstein
c)
A mole
d)
Avogadro
6.
Stoichiometry is
a)
The calculation of amounts in a chemical reaction
b)
A laboratory procedure used to separate solids and liquids
c)
The excess amount of substances in a reaction
d)
The reactant that has the least number of moles
7.
How many moles of CO2 are there in 22 grams?
a)
1 mole
b)
2 mole
c)
0.5 mole
d)
0.25 mole
8.
RMM for MgO is
a)
16
b)
40
c)
30
d)
24
9.
RMM for Cu(NO3)2 is
a)
126
b)
106
c)
74
d)
187
10.
RMM for Na2CO3 is
a)
100
b)
106
c)
74
d)
90
11.
How many moles are there in 4 g of oxygen atoms ?
a)
16
b)
4
c)
0.25
d)
0.125
12.
How many moles are there in 16g of helium atoms?
a)
0.25
b)
8
c)
4
d)
0.5
13.
How many moles are there in 8g of hydrogen molecules?
a)
8
b)
4
c)
16
d)
0.25
14.
How many moles are there in 440g of carbon dioxide molecules?
a)
11
b)
10
c)
16
d)
0.25
15.
How many moles are found in 740g of Ca(OH)2
a)
1
b)
10
c)
0.1
d)
74
100 %
