Worksheets8th Grade - Chemical Formula Review
Total questions: 10
Worksheet time: 6mins
Name
Class
Date
1.
How many oxygen atoms are in CO2?
a)
1
b)
2
c)
3
d)
4
2.
How many ELEMENTS are in C6H12O6?
a)
1
b)
3
c)
4
d)
24
3.
How many ATOMS are in C6H12O6?
a)
1
b)
3
c)
5
d)
24
4.
How many atoms are in C10H12N2O?
a)
4
b)
24
c)
25
d)
impossible to tell
5.
How many Hydrogen atoms are in this compound: (NH4)2CO3?
a)
2
b)
4
c)
8
d)
16
6.
How many Sulfur atoms are in Na2SO4?
a)
1
b)
2
c)
3
d)
4
7.
Which of these formulas contain equal numbers of nitrogen atoms?
a)
Formulas I and III
b)
Formulas I and IV
c)
Formulas II and III
d)
Formulas I, II, and V
8.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HClO3
d)
H2O
9.
How many phosphorus atoms are represented in the formula for Sr3(PO4)2?
a)
1
b)
2
c)
3
d)
4
10.
Which substances have the same number of carbon atoms in the table?
a)
Substances 1 and 2
b)
Substances 2, 3, and 4
c)
Substances 2 and 3 only
d)
Substances 1 and 3
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