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WorksheetsCP Chem Ch. 1 Review
Total questions: 20
Worksheet time: 49mins
Name
Class
Date
1.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
2.
How many significant figures does the following number have: 100.3
a)
4
b)
3
c)
5
d)
2
3.
How many significant figures does the following number have: 1740200
a)
2
b)
1
c)
3
d)
5
4.
Calculate 5.50 cm + 5.50 cm
a)
11 cm
b)
11.0 cm
c)
11.00 cm
d)
11.000 cm
5.
Calculate 12.34 + 1.234 + 0.1234
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
6.
How many significant figures does 1.90 × 10^8 have?
a)
3
b)
4
c)
6
d)
8
7.
Round 720.36 to two sig figs
a)
72
b)
73
c)
720
d)
720.00
8.
The expression of 5008 km in scientific notation is ____.
a)
5.008 x 103 km
b)
50.08 X 10-4 km
c)
5.008 x 10-3 km
d)
5.008 x 104 km
9.
What is the density of an object having a mass of 8.0 g and a volume of 25 cm3?
a)
0.32 g/cm3
b)
2.0 g/cm3
c)
3.1 g/cm3
d)
200 g/cm3
10.
What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?
a)
0.23 mL
b)
4.34 mL
c)
479 mL
d)
none of the above
11.
Find the density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g.
a)
6 cm3
b)
12 g/cm3
c)
128 g/cm3
d)
8 g/cm3
12.
You know 1000 mg = 1 g. Convert 2.5 grams into milligrams.
a)
25 mg
b)
25,000 mg
c)
250 mg
d)
2500 mg
13.
How many moles of carbon are in 12 g of carbon:
a)
.5
b)
6
c)
12
d)
1
14.
Avogadro's number is equal to:
a)
6.02 x 1023
b)
6.02 x 10
c)
6.02 x 1020
d)
6.02 x 1022
15.
How many miles will a person run during a 10 kilometer race?
(there are 1.6 kilometers in a mile)
(there are 1.6 kilometers in a mile)
a)
16
b)
6.25
c)
62.3
d)
8.5
16.
The length of a desk is 3.5 feet. How many centimeters is the length?
(there are 2.54 cm in an inch)
(there are 2.54 cm in an inch)
a)
60
b)
120.23
c)
106.68
d)
117.12
17.
What is the molar mass of sodium?
a)
11
b)
22.990
c)
45.98
d)
3
18.
How many moles of methane (CH4) are in 1.24 x 1023 molecules of methane?
a)
6.02 x 1023
b)
7.46 x 1046
c)
978
d)
0.206
19.
How many grams are in 1.5 moles of O?
a)
9.03 x 1023 grams
b)
16 grams
c)
24 grams
d)
6.02 x 1023 grams
20.
A container with a volume of 893 L contains how many moles of air at STP?
a)
20003.2 L
b)
39.9 L
c)
22.4 L
d)
none of the choices
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