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BASIC CONCEPTS OF CHEMISTRY

Total questions: 60

Worksheet time: 39mins

Name
Class
Date
1.
A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
a)
Organic
b)
Inorganic
c)
Analytical
d)
Physical
2.
The smallest unit of matter that retains the properties of that matter is
a)
a molecule
b)
a compound
c)
a mixture
d)
an atom
3.
Which statement best describes an element?
a)
any combination of two or more atoms of different types
b)
a pure substance made up of only one kind of atom
c)
a substance containing only carbon atoms
d)
any kind of crystal
4.
Which of the following changes is a physical change of matter?
a)
water evaporating
b)
paper burning
c)
a nail rusting
d)
a silver spoon tarnishing
5.
Which of the following changes is a chemical change of matter?
a)
ice melting to produce water
b)
vinegar combining with baking soda to produce carbon dioxide
c)
water boiling to produce water vapor
d)
liquid silica solidifying to form glass
6.
Which of the following is an example of a heterogeneous mixture?
a)
tap water
b)
chunky peanut butter
c)
orange-colored sugar water
d)
gold ring
7.
Which of the following is a pure substance?
a)
air
b)
granite
c)
water
d)
stainless steel
8.
Which of these recorded observations is qualitative, rather than quantitative?
a)
A chemical reaction is complete in 2.3 s.
b)
The solid has a mass of 23.4 g.
c)
The compound melts at 87.5C.
d)
Iron is denser than aluminum.
9.
Which of these statements is true of the scientific method?
a)
The steps may vary somewhat to suit the experiment.
b)
Working scientists rarely use it.
c)
Scientists must follow its steps exactly.
d)
Scientists rarely publish results of experiments.
10.
Theories are considered successful only if they
a)
can be used to make accurate predictions.
b)
can be stated in simple terms.
c)
can be written in the form of an equation.
d)
have been accepted by all scientists. 
11.
The SI base units for time and temperature are
a)
hour and degree Celsius.
b)
second and degree Celsius.
c)
hour and kelvin.
d)
second and kelvin.
12.
Which of these shows SI unit prefixes arranged in order from smallest to largest?
a)
centi, milli, kilo
b)
milli, centi, kilo
c)
kilo, milli, centi
d)
kilo, centi, milli
13.
A sample of bismuth has a mass of 343 g and a volume of 35.0 cm3.What is the density of bismuth?
a)
0.102 g/cm3
b)
9.80 g/cm3
c)
378 g/cm3
d)
1.20 104 g/cm3
14.
An object’s weight is a measure of 
a)
the force with which it is attracted by gravity.
b)
the pressure exerted on a scale.
c)
the amount of material per unit volume.
d)
the force causing the object to move.
15.
The SI base unit for mass is the
a)
gram
b)
cubic centimeter
c)
meter
d)
kilogram
16.
Expressed in scientific notation, 0.0930 m is
a)
93  X  10-3 m
b)
9.3  X 10-3 m.
c)
9.30 X  10-2 m.
d)
9.30 X 10-4 m.
17.

The boiling point of chlorine is ‑34.6 °C. This temperature

expressed in kelvins is

a)

-30.3K

b)

177.4K

c)

238.6K

d)

243.0K

18.

The momentum of an object is its mass times its velocity. What is the derived SI unit for momentum?

a)

kg/m

b)

kg m/s

c)

g m/s

d)

m/s2

19.

Which is the longest measurement?

a)

10 mm

b)

10 dm

c)

10 cm

d)

10 micrometer

20.

How many significant figures should be displayed in the result of the operation, 8.5201 + 1.93?

a)

1

b)

2

c)

3

d)

4

21.

The diameter of a certain atom was found to be 2.35 x 10‑8 cm. How many nanometers is this?

a)

2.35 x 101 nm

b)

2.35 x 10‑19 nm

c)

2.35 x 10‑1 nm

d)

2.35 x 10‑10 nm

22.

How many cm3 are in 0.00424 dm3?

a)

4.24 cm3

b)

0.424 cm3

c)

424 cm3

d)

0.0424 cm3

23.

The density of gold, expressed in non-SI units is 19.3 g/cm3. In SI units, the density is

a)

0.0193 kg/cm3

b)

1.93 x 104 kg/m3

c)

1.93 x 104 kg/cm3

d)

193 kg/m3

24.

An empty volumetric flask, weighing 27.16 grams, has a volume of 100.4 cm3. How much would it weigh when filled with bromine, an element that has a density of 3.1028 g/cm3?

a)

395.8 g

b)

284.4 g

c)

338.7 g

d)

311.5 g

25.

Convert 2.5 kg/m3 into g/m3

a)

0.25

b)

0.25

c)

0.0025

d)

0.00025

26.

Convert 39.45 g/mL into kg/L

a)

0.03945

b)

0.3945

c)

3.945

d)

39.45

27.
What is the correct SI unit for mass?
a)
Kilograms
b)
newtons
c)
pounds
d)
grams
28.
The SI unit for temperature is __?__.
a)
degree fahrenheit  (° F)
b)
degree celsius  (° C)
c)
kelvin  (K)
d)
degree centigrade  (°C)
29.

What SI unit is used to measure length?

a)

meters

b)

liters

c)

centimeters

d)

kilograms

30.
What SI unit is used to measure light intensity?
a)
meters
b)
liters
c)
candelas
d)
kilograms
31.
What SI unit is used to measure electric current?
a)
seconds
b)
amperes
c)
Kelvin
d)
mole
32.

SI stands for ___.

a)

Sports Illustrated

b)

Scientific Notation

c)

International System (of measurements)

d)

Instructional System (of measurements)

33.
What is the base unit for amount of substance?
a)
mole
b)
candela
c)
second
d)
kilogram
34.
What is the symbol for kilogram?
a)
kg
b)
s
c)
mol
d)
m
35.
What is the symbol for Kelvin?
a)
s
b)
m
c)
K
d)
cd
36.
What is the symbol for ampere?
a)
A
b)
cd
c)
s
d)
K
37.
What is the symbol for candela?
a)
m
b)
cd
c)
kg
d)
K
38.

Chemistry is formerly known as___________ and is the ___________science.

a)

Physics, Central

b)

Alchemy, Central

c)

Acidics, Psychometric

d)

Psychometric, Alchemist

39.

The 7 units of SI are (check all that apply)

a)

lumen, meter, seconds, kilograms

b)

kilograms, moles, volume

c)

amperes, Kelvin, Moles

d)

Moles, Celsius, Feet, lumen

40.

When you measure a person’s weight, you are measuring the

a)

gravitational force of the Sun on the Earth.

b)

gravitational force acting on that person.

c)

The mass

d)

The volume of a persons space

41.

Which of these is a difference between a solid and a liquid?

a)

Solids are made of atoms, but liquids are not.

b)

A solid has volume but not shape, while a liquid has shape but not volume.

c)

The particles of a solid vibrate in place, whereas a liquid's particles can flow.

d)

Solids are measured in three dimensions, but liquids are only measured in two.

42.

A change between a solid and gas is called

a)

boiling

b)

melting

c)

sublimation

d)

freezing

43.

What does it mean when we say a substance is water-soluble?

a)

The substance cannot be dissolved in water.

b)

The substance is always a solvent.

c)

The substance can be dissolved in water.

d)

The substance is already a solution.

44.

Matter is a substance that has ________. (Choose two)

a)

mass

b)

volume

c)

buoyancy

d)

conductivity

e)

solubility

45.

Which of the following are quantitative observations? (select all that may apply)

a)

The sky is blue.

b)

Oh' girls hair is ugly

c)

It is 250,000 miles from the earth to the moon.

d)

The wooden cart has a mass of 18.654 g

46.
How would you write 4.3756 x 104 in standard form?
a)
437,560,000
b)
0.00043756
c)
43,756
d)
4,3756
47.
Write 6,700 in scientific notation.
a)
6.7 x 103
b)
6.7 x10-3
c)
67 x 102
d)
67 x 10-2
48.

Determine the number of significant digits.

a) 0.0157 g ________________

b) 700 m ________________

c) 508,987 mm ________________

d) 1.2 x 103 ________________

e) 25 computers ________________

4 lines
49.

Round the following to the specified degree of accuracy. (4 pts)

8.696 to 2 significant figures ___________________

0.39888 to 3 significant figures ___________________

66.279 to 1 significant figure ___________________

279.09558 to 2 significant figures ___________________

4 lines
50.

Use a Conversion factor to solve the following.

1.9 x 105 mg = __________ dg

14.8 g = __________ µg

6.6 x 103 mm = __________ Dam

4 lines
51.

The SI units of measurement for the following are:

mass ___________________________

volume _________________________

length or distance ________________________

time ________________________

amount of matter ________________________

temperature

(a)  

52.

Convert the following numbers into standard notation. (6 pts)

a) 7.4 x 10-5 ____________________

b) 5.76 x 100 ____________________

c) 4.11 x 103 ____________________

4 lines
53.

Convert the following numbers into Scientific notation. (4 pts)

a) 0.0157 g ________________

b) 700 m ________________

c) 508,987 mm ________________

d) 1.2 ________________

4 lines
54.

Solve the following problems. (10 pts)

108 x 104 = _______________________

10 9/102 = _______________________

108/10 - 4 = _______________________

100 + 101 = _______________________

105 - 103 = _______________________

4 lines
55.

Is this image of a bee sting a physical or a chemical change?

a)

Physical change

b)

Chemical change

56.

Is this image of crushing ice a physical or a chemical change?

a)

Physical change

b)

Chemical change

57.

Is this image of condensation of water vapor a physical or chemical change?

a)

Physical change

b)

Chemical change

58.

Is this image of melting lead a physical or a chemical change?

a)

Physical Change

b)

Chemical change

59.

Which of the following prefix corresponds with its value?

a)

Tera = 103

b)

Mega= 106

c)

deci = 10-1

d)

micro = 10 -12

e)

hecto= 102

60.

Place a check mark next to the correct statements.

a)

Temperature is an extensive property of matter.

b)

Water's boiling point is 100 degrees Celsius

c)

The melting point is the temperature at which a gas turns into a liquid.

d)

Mass is an extensive property of matter.

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