WorksheetsNUMERICALS OF MOLE CONCEPT
Total questions: 10
Worksheet time: 30mins
Name
Class
Date
1.
How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Atomic mass of Al = 27, H= 1, O = 16)
a)
1.26 moles
b)
0.8 moles
c)
7,673.4 moles
d)
150 moles
2.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.0500 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
3.
How many grams are in 1.2 x 1024 molecules of CO? (molar mass of CO = 28 g/mol)
a)
28.2 g
b)
55.8 g
c)
6.02 g
d)
1.2 g
4.
A mole of Neon contains
6.02 x 1023 _____.
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
5.
How many molecules are in 2.00 moles of H2O?
a)
124x1024 molecules of H2O
b)
1.20x1023 molecules of H2O
c)
12.04 x1023 molecules H2O
d)
124
6.
How many atoms of iodine are in a mole of iodine?
a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
7.
How many gram is 0.5 mol of Copper atoms? (Cu:63,5g/mol)
a)
63,5 g
b)
6,35 g
c)
31,75 g
d)
3,175 g
8.
What is the mass of 2.50 mol of oxygen gas O2?
a)
40 g
b)
80 g
c)
16 g
d)
32 g
9.
How many moles are 98.3 grams of aluminum hydroxide, Al(OH)3? (Ar Al=27, H=1, O=16)
a)
1.26 moles
b)
0.8 moles
c)
7,673.4 moles
d)
150 moles
10.
Identify the number of Chlorine atoms in 65.8 g CaCl2.
a)
7.14 x 1023 atoms
b)
8.71 x 1023 atoms
c)
1.22 x 1023 atoms
d)
3.57 x 1023 atoms
100 %
