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WorksheetsCHEMISTRY CONVERSION (MOLES, MASS, REPRESENTATIVE PARTICLES)
Total questions: 19
Worksheet time: 5hrs 45mins
Name
Class
Date
1.
For the compound NaCl, if we had 10 grams of Chlorine (Cl), how many moles of Sodium would we have?
a)
0.282 mol Na
b)
3.55 mol Na
c)
35.45 mol Na
d)
1.55 mol Na
2.
How many moles are in 22 g of argon?
a)
880 moles
b)
0.55 moles
c)
1.81 moles
d)
5 moles
3.
The total number of sodium atoms in 46.0 grams is
a)
3.01 x 1023
b)
6.02 x 1023
c)
12 x 1023
d)
24 x 1023
4.
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
a)
setup B : 0.6644mol Co
b)
setup A: 2.41x1047mol Co
c)
setup A : 0.664mol Co
d)
setup B: 2.41x1047mol Co
5.
Which of the following dimensional analysis setups will correctly convert 2.50 moles of sodium to grams of sodium?
a)
A
b)
B
c)
C
d)
D
6.
Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?
a)
A
b)
B
c)
C
d)
D
7.
Determine the molar mass for carbon tetrachoride
a)
153.823 g/mol
b)
118.37 g/mol
c)
189.35 g/mol
d)
47.464 g/mol
8.
What is the mass of 1.0 x 1012 molecules of O2?
a)
1.9 x 1013 g
b)
6.0 x 1011 g
c)
5.3 x 10-11 g
d)
1.7 x 10-12 g
9.
What is the molar mass of sodium sulfate, Na2SO4?
a)
71.06 g/mol
b)
94.05 g/mol
c)
142.1 g/mol
d)
215.1 g/mol
10.
How many grams are in 2.4 moles of Sulfur?
a)
76.8
b)
0.075
c)
13.3
d)
32
11.
What is the molar mass of fluorine gas?
(beware!)
(beware!)
a)
18.998 g/mol
b)
38 g/mol
c)
9 g/mol
d)
18 g/mol
12.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
13.
Calculate the molar mass of Ba(C2H3O2)2
a)
255.3 g/mol
b)
237.3 g/mol
c)
228.3 g/mol
d)
196.3 g/mol
14.
BaCl2
a)
formula unit
b)
molecule
c)
atom
d)
ion
15.
Sr(NO3)2
a)
formula unit - 3 ions
b)
formula unit - 7 ions
c)
formula unit - 2 ions
d)
not a formula unit
16.
N2O4
a)
molecule - 3 atoms
b)
molecule - 6 atoms
c)
molecule - 2 atoms
d)
not a molecule
17.
What is the representative particle for MgCl2?
a)
atom
b)
molecule
c)
formula unit
d)
ion
18.
How many moles of carbon are in 1.2 x 1024 atoms of carbon?
a)
0.5 moles
b)
2.0 moles
c)
6.022 x 1023 moles
d)
1.2 x 1024 moles
19.
How many moles of eggs are present in 6.0 x 1023 eggs?
a)
6.0 x 1023 eggs
b)
6.0 x 1023 moles
c)
1.0 moles
d)
1 / (6.0 x 1023) moles
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