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WorksheetsCounting Atoms
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
Calculate the number of Oxygen atoms in Al(OH)3
a)
1
b)
2
c)
3
d)
4
2.
How many atoms of Hydrogen are in H2O
a)
1
b)
2
c)
3
d)
more than 3
3.
C3H5(NO3)3
a)
C = 3, H = 5, N = 3, O = 9
b)
C = 3, H = 5, N = 1, O = 9
c)
C = 9, H = 15, N = 3, O = 9
d)
C = 9, H = 15, N = 1, O = 3
4.
H2SO4
a)
H = 2, S = 4, O = 4
b)
H = 2, S = 1, O = 4
c)
H = 8, S = 4, O = 4
d)
H = 2, SO = 4
5.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
6.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
7.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
8.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
9.
How many TOTAL atoms are in this compound?
H2C3O4N5
H2C3O4N5
a)
5
b)
14
c)
15
d)
19
10.
How many atoms of Oxygen are in Fe(NO3)3 ?
a)
6
b)
3
c)
9
d)
1
11.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
12.
How many total POTASSIUM atoms are in this formula?
a)
8
b)
2
c)
4
d)
12
13.
Which formulas have the same number of HYDROGENs?
a)
b)
c)
d)
14.
How many CARBON are in this formula?
a)
5
b)
2
c)
10
d)
20
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