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WorksheetsAvogadro's number and molar volume
Total questions: 10
Worksheet time: 17mins
Name
Class
Date
1.
Molar volume of any gas at STP
a)
22.4 L
b)
2.24 L
c)
6.02 x 1023 L
d)
224 L
2.
A 2.00 L sample of pure oxygen gas (O2) is measured at STP. How many moles of oxygen is this?
a)
24.4 mol
b)
0.007 mol
c)
1.44 mol
d)
0.09 mol
3.
A sample of carbon dioxide at STP is 0.50 L. How many grams of carbon dioxide do we have?
a)
0.48 g
b)
0.49 g
c)
1.96 g
d)
0.98 g
4.
How many moles are in 225 g of CO?
a)
28.01 mol
b)
4.82 x 1024 mol
c)
6,302,25 mol
d)
8.0357 mol
5.
What is the formula to calculate the number of moles of a compound?
a)
Moles = mass/concentration
b)
Moles = molar mass/mass of sample
c)
Moles = mass/Mr
d)
Moles = distance/time
6.
What is Avogadro's constant?
a)
6.02 X 1023
b)
6.02 X 1022
c)
6.02 X 1032
d)
6.02
7.
In chemistry, a "mole" is:
a)
The mass of an atom
b)
A unit of measurement to count particles
c)
based on the volume of a substance
d)
The number of atoms
8.
The unit for molar mass is
a)
g/mol
b)
mol/g
c)
grams
d)
moles
9.
What is the total number of molecules in 1.0 mole of CO2?
a)
1.5 x 1023
b)
12 x 1023
c)
3 x 1023
d)
6.02 x 1023
10.
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
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