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WorksheetsHarder Mole Conversions
Total questions: 12
Worksheet time: 52mins
Name
Class
Date
1.
What mass of Ni has as many atoms as there are N atoms in 63.0 g of NO2?
a)
8.24 x 1023 atoms Ni
b)
63.0 g Ni
c)
80.4 g Ni
d)
1.37 mol Ni
2.
How many atoms are in a 3.56 g sample of Cu?
a)
3.37 x 1022 Cu atoms
b)
6.02 x 1023 Cu atoms
c)
0.056 Cu atoms
d)
1 Cu atom
3.
How many g of CaCO3 are present in a sample if there are 4.52 x 1024 atoms of carbon in that sample?
a)
100 g CaCO3
b)
7.51 g CaCO3
c)
90.2 g CaCO3
d)
751 g CaCO3
4.
How many moles of oxygen atoms are contained in 2.50 mol of KMnO4?
a)
10.0 mol O atoms
b)
2.50 mol O atoms
c)
1.50 x 1024 mol O atoms
d)
0.625 mol O atoms
5.
How many moles of argon atoms are present in 11.2 L of argon gas at STP?
a)
250.88 mol Ar
b)
0.500 mol Ar
c)
2 mol Ar
d)
1 mol Ar
6.
How many oxygen molecules are in 3.36 L of oxygen gas at STP?
a)
0.150 mol O2
b)
2.02 x 1024 molecules O2
c)
2 molecules O2
d)
9.03 x 1022 molecules O2
7.
Find the mass in grams of 2.00 x 1023 molecules of F2.
a)
0.332 g
b)
7.44 g
c)
6.31 g
d)
12.6 g
8.
You have 8.65 x 1025 atoms arsenic. How many grams do you have?
a)
144 g As
b)
10,765 g As
c)
107 g As
d)
None of these
9.
Calculate the number of atoms in 0.0340 g Zn.
a)
5.200 x 10-4 atoms Zn
b)
3.130 x 1023 atoms Zn
c)
3.130 x 1020 atoms Zn
d)
1 atom Zn
10.
Which has more atoms, 12.0 g of C or 12.0 g of Ca?
a)
12.0 g C
b)
12.0 g Ca
c)
They are equal
11.
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?
a)
12.0 mol C
b)
12.0 mol Ca
c)
They are equal
12.
How many chlorine atoms are in 2.5 mol CCl4?
a)
1.50 x 1024 atoms Cl
b)
6.02 x 1024 atoms Cl
c)
9.26 x 1025 atoms Cl
d)
9.26 x 1026 atoms Cl
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