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WorksheetsCompound Composition Practice
Total questions: 20
Worksheet time: 7mins
Name
Class
Date
1.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
2.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
3.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
4.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
5.
How many atoms of Hydrogen are in this compound
a)
1
b)
2
c)
3
d)
4
6.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
7.
If there is no subscript, there is ______ atom(s) of that element.
a)
0
b)
2
c)
only 1
d)
1 million
8.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
9.
How many atoms of Oxygen are in this compound?
a)
1
b)
2
c)
3
d)
4
10.
How many atoms are in the element Carbon in this compound?
H2C3O4N5
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
11.
How many TOTAL atoms are in this compound?
H2C3O4N5
H2C3O4N5
a)
5
b)
14
c)
15
d)
19
12.
How many elements are present in this compound?
Mg2As3COHNi2
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
13.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
14.
The number of Na's in Na₂CO₃
a)
1
b)
2
c)
3
d)
6
15.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
16.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
17.
How many Chlorine are in MgCl2?
a)
2
b)
1
c)
3
18.
What is the mass of an atom if it has 11 protons, 12 neutrons, and 11 electrons?
a)
22
b)
11
c)
34
d)
23
19.
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
a)
10
b)
20
c)
30
20.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
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