WorksheetsNBC 3 Mole Conversion I
Total questions: 12
Worksheet time: 22mins
Name
Class
Date
1.
How many atoms of iodine are in a mole of iodine?
a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
2.
What is the mass of 2.50 mole of oxygen gas O2?
a)
40 g
b)
80 g
c)
16 g
d)
32 g
3.
How many moles are present in 32.3 grams of carbon dioxide (CO2)?
a)
44.01 moles
b)
1421.52 moles
c)
32.3 moles
d)
0.73 moles
4.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
5.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5 moles
6.
What is the mass of 0.89 mol of CaCl2?
a)
111 grams
b)
0.008 grams
c)
98.7 grams
d)
none of the choices
7.
The total number of sodium atoms in 46.0 grams is
a)
3.01 x 1023
b)
6.02 x 1023
c)
1.2 x 1024
d)
2.4 x 1024
8.
What is the molar mass of PbSO4?
a)
303.27 g/mol
b)
255.27 g/mol
c)
163.87 g/mol
d)
372.27 g/mol
9.
How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?
a)
1.26 moles
b)
0.8 moles
c)
7,670 moles
d)
1.63 x 10-22 moles
10.
What is the molar mass of table salt (NaCl)? Read all options! Be careful!
a)
58.44 amu
b)
35.45 g/mol
c)
22.99 g/mol
d)
58.44 g/mol
11.
Find the percent composition of hydrogen in (NH4)2S.
a)
11.8%
b)
41.1%
c)
47.1%
12.
How many moles are in 19.82 g Mg?
a)
1.226mol Mg
b)
481.7mol Mg
c)
1.000mol Mg
d)
0.8156 mol Mg
100 %
