Focus On Physical Science: California Grade 8

Chapter 5: Combining Atoms and Molecules

Math Practice

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1.
How many atoms of sodium are in 4 molecules of NaCl?
A)1
B)2
C)4
D)6
2.
How many atoms of silicon are in 5 molecules of SiOsub2?
A)10
B)5
C)2
D)1
3.
How many atoms of oxygen are in 5 molecules of SiOsub2?
A)1
B)5
C)2
D)10
4.
How many atoms of nitrogen are in 5 molecules of Ba(NOsub3)sub2?
A)10
B)3
C)30
D)5
5.
How many atoms of oxygen are in 5 molecules of Ba(NOsub3)sub2?
A)3
B)10
C)30
D)5
6.
How many atoms of barium are in 5 molecules of Ba(NOsub3)sub2?
A)3
B)5
C)10
D)30
7.
How many atoms of nitrogen are in 3 atoms of (NHsub4)sub2S?
A)8
B)3
C)24
D)6
8.
How many atoms of hydrogen are in 3 atoms of (NHsub4)sub2S?
A)24
B)6
C)3
D)8
9.
How many atoms of sulfur are in 3 atoms of (NHsub4)sub2S?
A)24
B)6
C)3
D)8
10.
How many atoms of hydrogen are in 6 atoms of Csub2Hsub6?
A)6
B)36
C)12
D)18
Grade 8
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