Practice Chapter 1: Scientific notation and Significant figures
1.Change the following numbers from scientific notation to regular notation.
a) 6.02 x 1023
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b) 3.0194 x 104
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c) 7.51 x 10-7
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d) 9.08 x 10-2
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e) 8.4307 x 109
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f) 1.005 x 106
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g) 2.76 x 10-15
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2.Express the following numbers in scientific notation, making sure there is only one
nonzero digit to the left of the decimal place. Do not discard any nonzero digits.
a) 44000000000000
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b) 0.000360
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c) 0.09000080
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d) 22000
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e) 0.00000011
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f) 974.00
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g) 5125
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3. For each of the following quantities, underline the zeroes that are significant
figures.
a) 140.0790
b) 0.02000030
4.
Give the number of significant figures in the following numbers:
a) 2.30x105
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b) 6.403x10-7
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c) 71200.0
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d) 40091.20
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e) 330.00
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f) 0.0005
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g) 96388
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5.
Perform the following operations and give the answers with the correct number of
significant figures and include units on your answers.
a) 33.75g - 1.8g =
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b) 3.8mL + 0.775mL =
_______________________
c)
d)
!".!" !
!!.!!"
!.!" !
!.!" !"
=
_______________________
=
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e) (34.5g) × (4.18 J/g ∙oC) × (9.7oC) =
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6. Round off the following numbers using four significant figures in your answer.
Use scientific notation if needed.
a) 10773
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b) 10779
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c) 10899
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7.
a)
b)
Perform the following operations using your calculator and put your answer in
correct scientific notation with the correct number of significant figures.
!.!"#
!.!!"
×( 6.02 x 1023) =
!.! ! !"!
!.! ! !"!!
=
_______________________
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c) (5.01 x 103) × (7.00 x 10-8) = _______________________
d)
(!".!!!".!!")
!.!!"#$"
=
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