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Unit 1 practice

Total questions: 43

Worksheet time: 2hrs 47mins

Name
Class
Date
1.
How many sig figs are there?
100.00
a)
1
b)
3
c)
4
d)
5
2.
How many sig figs are there?
100000000
a)
1
b)
9
c)
10
3.
How many sig figs are there?
4004
a)
1
b)
2
c)
3
d)
4
4.
How many sig figs are there?
9009.00
a)
2
b)
4
c)
5
d)
6
5.
How many significant figures does the following number have: 2001800.
a)
1
b)
4
c)
6
d)
7
6.
How many significant figures does the following number have: 0.0079010
a)
1
b)
4
c)
5
d)
9
7.
Calculate 1.23 m x 0.89 m and give your answer with the correct number of significant figures.
a)
1.0 m2
b)
1.1 m2
c)
1.0947 m2
d)
1.095 m2
8.
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
9.
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
10.
Which of the following numbers have four significant figures?
a)
56.75 g
b)
40.01 g
c)
0.6000 g
d)
all of the choices
11.
Round off 509.96 to 4 significant figures.
a)
509.9
b)
509.0
c)
510.0
d)
510
12.

Solve. Round using SigFig math rules.

12.5 mL + 20.05 mL + 2.69 mL

a)

35 mL

b)

35.2 mL

c)

35.24 mL

d)

35.240 mL

13.
The teacher reported that she has 15 girls in her class. How many significant figures does the number reported by the teacher have?
a)
infinite
b)
2
c)
15
d)
1
14.
How would you write 4.3756 x 104 in standard form?
a)
437,560,000
b)
0.00043756
c)
43,756
d)
4,3756
15.

How would you write 0.0005 in scientific notation?

a)

50 x 10-5

b)

5 x 10-4

c)

5 x 103

d)

.5 x 103

16.
How would you write -5.6 x 10-3 in standard form?
a)
0.0056
b)
-5,600
c)
0.00056
d)
-0.0056
17.
Scientific Notation is made up of two number parts. The first part should be a number between 1 and 100.
a)
True
b)
False
18.

How do you write

8.317 x 106

in standard form?

a)

8,371,000

b)

83,170,000

c)

837,100

d)

8,317,000

19.
Which of the following is correct scientific notation?
a)
20.35 x 104
b)
.2035 x 104
c)
2035 4
d)
2.035 x104
20.
Express the following in scientific notation:
.000457
a)
457 x 106
b)
457 x 10-6
c)
4.57 x104
d)
4.57 x 10-4
21.

Convert to scientific notation:

520,000,000

a)

52 x 107

b)

5.2 x 10-7

c)

5.2 x 108

d)

0.52 x 109

22.

What is scientific notation?

a)

A long way to write really short numbers

b)

A short way to write really large or really small numbers

c)

I don't know...

d)

None of the above

23.

If the exponent is a positive number the original number was...

a)

a really big number.

b)

a really small number.

24.

If the exponent is a negative number the original number was...

a)

a really large number.

b)

a really small number.

25.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
26.
?
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
27.
Describe the accuracy and precision of the image
a)
Accurate and Precise
b)
Accurate and not precise
c)
Not Accurate and Precise
d)
not accurate and not precise
28.
What is the volume? Count by 2s.
a)
22 ml
b)
25 ml
c)
28 ml
d)
18 ml
29.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
30.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
31.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.05 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5 moles
32.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
33.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
34.
What is the mass of 0.89 mol of CaCl2?
a)
111 grams
b)
0.008 grams
c)
98.9 grams
d)
none of the choices
35.
What is the percent by mass of oxygen in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
36.
Find the percent composition of Cu2S?
a)
%Cu= 67.987 %S= 32.013
b)
%Cu= 79.854   %S= 20.145
c)
%Cu= 35.946   %S= 64.054
37.
What is the definition of molar mass?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
38.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
39.

What is the mass of one mole of aluminum?

a)

26.98 g

b)

13 g

c)

53.98 g

d)

14 g

40.

How many molecules are in 1 mole?

a)

1

b)

12

c)

6.02 x 1023

d)

6.23 x 106

41.

What is the mass of 1 mole of calcium carbonate, CaCO3?

a)

99.01 g

b)

100.09 g

c)

216.87 g

d)

84.09 g

42.
How much liquid is in this graduated cylinder?
a)
30 mL
b)
30 cm
c)
30 Apples
d)
3,000 mL
43.
How much liquid is in this graduated cylinder?
a)
30 mL
b)
5 cm
c)
5.4 mL
d)
0.54 mL

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