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Scientific Notation and Measurements in introductory chemistry

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Name ___________________________________________________Date_________________ Pd____
Day 1 Classwork
Scientific Notation, Significant figures, and Metric System
Convert the following to or from Scientific Notation:
1.
3 x 103
_____________
6.
43,200
_____________
2.
3.2 x 10-3
_____________
7.
– 45.67
_____________
3.
7.28 x 106
_____________
8.
37,235,000
_____________
4.
5 x 10-2
_____________
9.
0.00234
_____________
5.
- 3.35 x 10-5
_____________
10.
1.001
_____________
Significant Figures:
1. Report the following volume measurements with the correct number of digits
g) Ruler A______
h)Ruler B______
CHEM099
2.
Identify the following numbers as Exact or Inexact:
a. A classroom contains 24 students.
____________
b. A car is traveling at a speed of 45 miles per hour.
____________
c. Your neighbor weighs 152 pounds.
____________
d. The temperature on the beach is 95F.
____________
e. Your niece is 6 years old.
____________
f.
____________
A newspaper article contains 189 words.
g. A paper clip has a mas of 0.62 grams.
____________
h. Your cousin is 65 inches tall.
____________
i.
The flight from New York to Los Angeles is 6 hours.
____________
j.
The length of a copper rod is 6.37 meters.
____________
k. The atmospheric pressure is 760 torr.
____________
l.
____________
There are 18 apples in a bag.
m. A circle has a diameter of 12.6 cm.
____________
n. A cube has a volume of 8 m3.
____________
o. There are 438 parking spaces available at RC.
____________
3.
How many significant figures does each of the following measurements contain?
a. 3.405 x 105
_________________
g. 40
_________________
b. 0.00289
_________________
h. 0.02303
_________________
c. 1030
_________________
i.
607
_________________
d. 200
_________________
j.
2,567
_________________
e. 102.00
_________________
k. 25.0
_________________
f.
0.000980
_________________
l.
_________________
4.
Round each of the following measurements to three significant figures:
a. 342.79513mm
____________
b. 9,845.8749 μL
____________
c. 0.000045389 kg
____________
d. 2.3444444495 nL
____________
e. 65.89 mg
____________
f.
____________
56.9971 kg
2
2.0
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