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Unit 1 CHEMISTRY

Total questions: 50

Worksheet time: 2hrs 45mins

Name
Class
Date
1.
Is a strong gaseous odor coming from the fridge a chemical or physical change?
a)
Chemical
b)
physical
2.
rubbing alcohol evaporates
a)
physical change
b)
chemical change
3.
Convert 8 kilometers to meters
a)
800 m
b)
80,000 m
c)
8,000 m
d)
.008 m
4.
There are _____ centigrams (cg) in 308 hectagrams (Hg)
a)
.0308 cg
b)
30800 cg
c)
3080 cg
d)
3080000 cg
5.
Convert the following measurement:
6357mL = ?L
a)
.6357L
b)
6.357L
c)
6357000L
d)
6.3.5.7L
6.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
7.
Mercury has a density of 13.6 g/cm3 . What is the volume of 20.00 g of mercury in cm3 ?
a)
2.0cm3
b)
1.47cm3
c)
1.40cm3
d)
5.0cm3
8.
Which units of measurement are used for volume?
a)
grams
b)
centimeters
c)
grams/milliliter
d)
milliliter
9.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
10.
How many sig figs are there?
100.00
a)
1
b)
3
c)
4
d)
5
11.
How many sig figs are there?
100000000
a)
1
b)
9
c)
10
12.
How many sig figs are there?
0.000008
a)
1
b)
2
c)
6
d)
7
13.
How many sig figs are there?
0.00400
a)
1
b)
3
c)
5
d)
6
14.
How many sig figs are there?
9009.00
a)
2
b)
4
c)
5
d)
6
15.
How many sig figs are there?
0.0009009090000
a)
3
b)
10
c)
14
16.
How many sig figs are there?
4000.
a)
1
b)
3
c)
4
17.
What is 98.907 rounded to 1 significant figure?
a)
98.9
b)
90
c)
100
d)
98.91
18.

What is 0.658 rounded to 1 significant figure?

a)

0

b)

0.66

c)

0.7

d)

0.658

19.
How many Significant Figures in the number below?
4.56 x 103
a)
5
b)
4
c)
6
d)
3
20.
Calculate 0.020 cm x 50 cm x 11.1 cm and give your answer with the correct number of significant figures.
a)
10 cm3
b)
11.1 cm3
c)
11 cm3
d)
11. cm3
21.
Calculate 12.47 m ÷ 3.2 s and give your answer with the correct number of significant figures.
a)
4 m/s
b)
3.9 m/s
c)
3.90 m/s
d)
3.897 m/s
22.
When performing the calculation 34.530 g + 12.1 g + 1222.34 g the final answer must have
a)
Three significant figures
b)
One decimal place
c)
Two decimal places
d)
Three decimal places
23.
Round 1009 to three sig figs
a)
100
b)
101
c)
1010
d)
1000
24.
Calculate 12.34 + 1.234 + 0.1234
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
25.
Calculate 12.34 × 1.234 × 0.1234
a)
1.87908
b)
1.879
c)
1.9
d)
1.8790809
26.
Calculate 0.020 cm x 50 cm x 11.1 cm and give your answer with the appropriate number of significant figures.
a)
10 cm3
b)
11.1 cm3
c)
11 cm3
d)
11. cm3
27.
How many minutes are in a year?
a)
I can't count that high.
b)
525,600min
c)
52,560min
d)
31,536,000min
28.
How many years are in a 3 months?
a)
Uh Duh! There are no years in a month!
b)
.75yrs
c)
.50yrs
d)
.25yrs
29.
What unit should be in the denominator of the conversion factor?
a)
yards
b)
leagues
c)
feet
d)
fathoms
30.
What unit should be in the numerator of the conversion factor?
a)
yards
b)
leagues
c)
feet
d)
fathoms
31.
A passenger jet has a speed of 900 km/h.
What is its speed in m/s?
(1 km = 1000 m)
a)
250 m/s
b)
324 m/s
c)
1,500 m/s
d)
2,500 m/s
32.
Gas costs $3.05 a gallon, and your car travels at 27 miles for each gallon of gas. How far can you travel in your car with $95 in your pocket?
a)
11 miles
b)
840 miles
c)
7800 miles
d)
870 miles
33.

How many hours are in a fortnight (2 weeks)?

1 week = 7 days; 1 day = 24 hours [Note: do not round answer]

a)

672 hours

b)

168 hours

c)

336 hours

d)

504 hours

34.

Jonathan raised 60 goats, then he traded all the goats for sheep at an exchange rate of 5 goats for 7 sheep. Next, he exchanged all the sheep for hogs at a rate of 4 sheep for 2 hogs. How many hogs did he get?

a)

62 hogs

b)

42 hogs

c)

84 hogs

d)

86 hogs

35.

Eggs are shipped from a farm in trucks. Each carton of eggs holds 12 eggs. The cartons of eggs are placed in a crate that holds 20 cartons, which are packed in trucks that each carry 3130 crates of eggs. How many truckloads will it take to carry 3.75 x 106 eggs? [Round your answer to 1 sig fig]

a)

3 trucks

b)

4 trucks

c)

5 trucks

d)

9 trucks

36.

You have a summer job serving ice cream cones at the beach, serving an average of 25 cones per hour. You work 8 hours per day, 5 days a week, and get paid a salary of $940.34 every 2 weeks. Approximately how many ice cream cones will you have to serve to earn the $5,800 you are saving to buy a car? [Round your answer to 2 sig figs]

a)

12,000 cones

b)

62,000 cones

c)

21,000 cones

d)

95,000 cones

37.

You roof has a leak. If it leaks at a rate of 14 drops per minute, how many hours will it take to fill a 5 gallon bucket? (20 drops = 1 mL; 30 mL = 1oz; 64 oz = 1 gal) [Round answer to 2 sig figs]

a)

230 hours

b)

950 hours

c)

190 hours

d)

1900 hours

38.
Gold 
a)
G
b)
Gl
c)
Au
d)
Ag
39.
Ag
a)
Agnus
b)
Silver
c)
Gold
d)
August
40.
lead
a)
L
b)
Le
c)
Pb
d)
Pd
41.

What is the symbol for Uranium?

a)

Ur

b)

Un

c)

Um

d)

U

42.

What is the symbol for Tin?

a)

Ti

b)

Sn

c)

Tn

d)

Si

43.

If 109.5 g of a substance occupies 130.1 cm3. What is its density?

a)

8 4.17 g/cm3

b)

0.8417 g/cm3

c)

0.84 g/cm3

d)

0.8 g/cm3

44.

In Raiders of the Lost Ark, Indiana Jones tried to remove a gold idol from a pedestal. He replaces the idol with a bag of sand. If the idol has a mass of 2.000 kg, how many liters of sand must he place on the pedestal? Density of sand 3.000 g/cm3

a)

10.7 L

b)

2.000 L

c)

0.67 L

d)

0.6667 L

45.

A cylinder with a diameter of 2.9 cm and a mass of 86 grams has a density of 1.43 g/cm3 . What is the height of the cylinder?

a)

21 cm

b)

0.91 cm

c)

9.1 cm

d)

60.1 cm

46.
Divide (7.78 x 10 ^8) / (9.67 x 10 ^-9) and express in scientific notations.
a)
8 x 10 ^16
b)
7 x 10 ^15
c)
8 x 10 ^15
d)
7 x 10 ^16
47.

Multiply (2.45 x 10 ^4) x (8.78 x 10 ^6) and express in scientific notations.

a)

2.15 x 10 ^11

b)

2.15 x 10 ^14

c)

2.10 x 10 ^14

d)

2.10 x 10 ^15

48.

How would you write 0.0005 in scientific notation?

a)

50 x 10-5

b)

5 x 10-4

c)

5 x 10-3

d)

.5 x 10-3

49.
Solve & Round to Correct Sig Figs.
100 / 2.0 = 
a)
50
b)
50.
c)
50.0
d)
50.00
50.
How many inches are in 1 mile?
(Hint:  5280 ft = 1 mi)
(3 ft = 1 yd)
a)
66,330 in
b)
63,360 in
c)
63,660 in
d)
63,066 in

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