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Chemistry 1 Mid term Exam

Total questions: 100

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

Weight is

a)

the Earth's gravitational pull of an object

b)

the amount of matter in an object

c)

the relationship between the amount of matter in an object and its volume

2.

A verbal, visual, or mathematical explanation for something is a(n):

a)

hypothesis

b)

model

c)

controlled variable

3.

Which of the following is a definition that classifies matter?

a)

the volume of the object

b)

the mass of the object

c)

matter is the same thing as energy

d)

anything that has mass and takes up space

4.

A student describes a chemical reaction, stating that it formed 32

grams of a precipitate and gave off 16 mL of Oz gas. His/her

description is:

a)

qualitative

b)

quantitative

5.

Which of the following correctly describes a hypothesis and theory?

a)

they are both mathematical models

b)

both can become scientific laws with enough support

c)

a hypothesis is an explanation for data gathered in an experiment,

while a theory is an explanation supported by many experiments

6.

A judgment formed from information obtained during an experiment is

called a(n)

a)

conclusion, control

b)

conclusion, law

c)

control, conclusion

d)

model, control

7.

When Preparing an acid solution

a)

Add the water to the acid very slowly

b)

Add the acid to the water very slowly

8.

Which of the following is true?

a)

The independent variable changes in response to the dependent variable

b)

The dependent variable changes in response to the independent variable

9.

An atom exists in:

a)

the submicroscopic world, because atoms can't be seen even with

an ordinary microscope

b)

the microscopic world, because atoms can be seen with an

ordinary microscope

c)

the macroscopic world, because atoms can be seen with the naked

eye

10.

An object has a mass of 360 kilograms on Earth. What is this object's

mass on the moon?

a)

60 kilograms

b)

1800 kilograms

c)

360 kilograms

11.

Another name for accuracy is:

a)

precision

b)

closeness to actual answer

c)

consistency

d)

all of the above

12.

These are used to determine the # of digits in a conversion problem:

a) rounded numbers

a)

the significant digits in your original measurements

b)

every number in a problem

c)

rounded numbers

13.

n bar graphs and line graphs, the independent variable (the quantity

being controlled) should always appear on the:

a)

x axis

b)

y axis

14.

The base Sl units for length, mass, and amount are:

a)

the meter, kilogram and mole respectively

b)

the meter, gram and mole respectively

c)

the kilometer, kilogram and liter respectively

15.

When the measurement 220,584 g, is rounded to four significant

figures, it becomes:

a)

220,600 g

b)

2205 g

c)

220,500 g

16.

0.005980 mg has:

a)

three significant figures

b)

seven significant figures

c)

four significant figures

17.

What is the density of mineral oil if 18.0 grams of the oil occupy a

volume of 15.2 ml?

a)

0.84 g/ml

b)

2.46 g/ml

c)

1.18 g/ml

18.

The density of steel is 7.84 g/cm3. What is the mass of a steel cube

with measurements of 1.25 cm x 1.25 cm x 1.25 cm?

a)

15.3 g

b)

4.12 g

c)

5.94 g

19.

When 60.0 m/s is converted to km/hr, it becomes;

a)

14.0 km/hr

b)

140,000 km/hr

c)

216,000,000 km/hr

d)

216 km/hr

20.

1 lb (pound) = 453.59 g. If a child weighs 24.0 kg, how many pounds

does the child weigh?

a)

52.9 lbs

b)

70.5 lbs

c)

18.9 lbs

21.

Density:

a)

physical, extensive

b)

chemical

c)

physical, intensive

22.

Burns:

a)

physical extensive

b)

chemical

c)

physical intensive

23.

Of the following, which is probably an indication of a physical change:

a)

change in color

b)

Change in temperature

c)

melting

d)

formation of gas

24.

Which of the following is NOT an example of a chemical change?

a)

baking

b)

rusting

c)

burning

d)

evaporating

25.

For a mixture to be heterogeneous,

a)

it must have two or more distinct phases, each capable of being

seen

b)

it can only have one distinct phase that is seen

26.

Brass (a mixture of two metals):

a)

heterogeneous

b)

homogeneous

27.

Sand from a seashore:

a)

heterogeneous

b)

homogeneous

28.

Filtration is a technique that would be used to:

a)

separate two liquids with different boiling points

b)

separate a solid from a liquid

c)

separate two solids

29.

Steel, which is a homogeneous mixture of metals, can also be

described as a(n):

a)

compound

b)

element

c)

alloy

30.

These have a definite shape:

a)

solids

b)

liquids

c)

gases

31.

Was created with designing the original periodic table of elements

a)

Rutherford

b)

Dalton

c)

Democritus

d)

Mendeleev

32.

The Greek Philosopher that was shunned by Aristotle because of his views on matter.

a)

Dalton

b)

Thomson

c)

Democritus

d)

Rutherford

33.

Discovered the electron developed the Plum Pudding model

a)

Thomson

b)

Dalton

c)

Rutherford

d)

Mendeleev

34.

Father of modern chemistry, developed modern atomic theory

a)

Rutherford

b)

Dalton

c)

Thomson

d)

Democritus

35.

Discovered the nucleus with the gold foil experiment

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Mendeleev

36.

The charge of a proton is

a)

Positive

b)

Neutral

c)

Negative

37.

The two sub atomic particles that have opposite charges are the

a)

proton and electron

b)

proton and neutron

c)

proton and electron

38.

How many neutron does copper 62 have

a)

27

b)

29

c)

33

39.

How many protons does bismuth 188 have

a)

105

b)

83

c)

209

40.

what is the mass number for the isotope of chlorine with 20 neutrons

a)

124

b)

35

c)

37

41.

An atomic orbital is

a)

an exact path an electron takes

b)

a probable location for an electron to be found

42.

What is released when electrons move with the atom

a)

energy

b)

colors of light

c)

both A and B

43.

How many total atomic orbitals are found in the 2nd principal energy level n=2

a)

4

b)

6

c)

8

44.

What types of orbitals can be found in the 3rd principle energy level, n=3

a)

only s

b)

only s and p

c)

only s p and d

d)

s p d and f

45.

This state that orbital may describe at most two electrons, each with opposite spin direction and also states no two electrons in the same atom can have the same set of four quantum numbers

a)

Hund's rule

b)

Aufbau principle

c)

Pauli exclusion Principe

46.

Colors are given off when

a)

electrons jump to higher energy levels

b)

electrons return back to their original level

47.

Which of the following has the lowest frequency

a)

radio waves

b)

microwaves

c)

gamma waves

48.

the electron configuration for copper is

a)

1s2 2s2 2p6 3s2 3p6 4s2 3d9

b)

1s2 2s2 2p6 3s2 3d10 3p2 4s2 4p2

c)

1s2 2s2 3s2 4s2 4p2

49.

The corresct noble gas configuration for copper is

a)

[Ar] 4s2 3d9

b)

[Ar] 4s2 4d9

c)

[Ar] 4s1 3d10

50.

Which has the lowest energy

a)

n=1

b)

n=2

c)

n=3

d)

n=4

51.

Calculate the frequency of radiation with a wavelength of 1.5 x 10^-10 m

a)

2.0 x 10^-18 /s

b)

2.0 x 10^18 /s

c)

2.32 x 10^-43 /s

52.

Calculate the energy of photon having a frequency of 3.0 x 10^20 /s

a)

1.21 x 10^-14 J

b)

2.67 x 10 ^-58 J

c)

1.99 x 10-13 J

53.

A compound that has a specific number of water molecules bound to its atoms is called.

a)

an anhydrate

b)

a hydrate

c)

precipitate

d)

vapor

54.

A compound or molecule that actually exists, where the number of atoms of each element are specified is called

a)

a molar mass

b)

an empirical formula

c)

a hydrate

d)

a molecular formula

55.

A formula with the smallest whole number mole ratio of elements is called

a)

mole ratio

b)

empirical formula

c)

a hydrate

d)

a molecular formula

56.

Percent by mass of each element in a compound is called

a)

mole ratio

b)

empirical formula

c)

percent compostion

d)

molecular formula

57.

One mole of NaOH has a mass of approximately 40 grams. This mass is called

a)

molar mass

b)

percent mass

58.

6.02 x 10^23 is

a)

Avogadro's number

b)

the number of atoms in 12.011 grams of carbon

c)

equal to the number of water molecules in one of water

d)

all of the above

59.

The molar mass of Al2 (SO4)3

a)

342.17 g/mol

b)

278.03 g/mol

c)

262.17 g/mol

60.

How many grams are in 192 moles of HCI

a)

2.50 x 10^3 g

b)

3.99 x 10^4 g

c)

6.91 x 10^3 g

61.

How many moles are there in 400.0 g of NaOH

a)

4 moles

b)

10 moles

c)

33 moles

62.

How many atoms are there in 24 grams of ozone O3

a)

9.0 x 10^23

b)

3.0 x 10^23

c)

2.0 x 10^23

63.

Calculate the mass in grams of zinc in 155 grams of zinc nitrate Zn(NO3)2. Round to the ones place

a)

66.0%

b)

25.3%

c)

45.8%

d)

50.8%

64.

Calculate the mass in grams of zinc in 155 grams of zinc nitrate Zn(NO3)2

a)

53.3 g

b)

451 g

c)

79.3 g

65.

Calculate the mass in grams of 9.55 x 10^18 molecules of NO2

a)

4.39 x 10^20 g

b)

7.30 x 10^-4 g

c)

3.45 x 10^-7 g

66.

A compound is 69.8% iron and 30.2% oxygen. What is the empirical formula for this compound

a)

Fe2O3

b)

FeO

c)

Fe3O4

67.

A compound is composed of 62.5% calcium and 37.5% carbon. The molecular weight of this compound is 198. What is the molecular formula for this compound

a)

CaC

b)

CaC2

c)

Ca2C4

d)

Ca3C6

68.

Calculate the molecular formula for a compound with a molecular weight of 30.0 g which is 80.0% carbon and 20.0% hydrogen.

a)

CH

b)

C2H2

c)

C2H4

d)

C2H6

69.

Hydrogen an explosive gas can be produced by a reaction of

a)

hydrogen peroxide and manganese dioxide

b)

zinc and sulfuric acid

70.

A centrifuge is a device that

a)

separates two liquids from each other by heat

b)

separates a solid from a liquid by spinning

c)

separates a solid from a liquid by filtering

71.

Which of the following ranks the device for measuring volume from least accurate to the most accurate

a)

flask, graduated cylinder, beaker

b)

beaker, flask, graduated cylinder

c)

graduated cylinder, beaker, flask

72.

If you wanted to test to see what mixture of colors was used to make the purple ink in a magic marker you best separate the colors in the in by

a)

using a flitter

b)

using a magnet

c)

chromatography

d)

distillation

73.

This is used to reset an analytical balance to zero grams

a)

reset button

b)

tare button

c)

on/off button

74.

A graduated cylinder shows milliliter values by showing the numbers one to ten printed on the cylinder. There are ten markings lines between each one of those numbers. All volumes measured with this cylinder should recorded to

a)

the nearest milliliter

b)

the nearest 0.1 of a milliliter (tenth of ml)

c)

the nearest 0.01 of a milliliter (hundredth of ml)

d)

the nearest 0.001 of a milliliter (thousandth of a ml)

75.

One O2 is called

a)

a formula unit

b)

a molecule

c)

an atom

76.

The smallest unit of an ionic compound is called

a)

a formula unit

b)

a molecule

c)

an atom

77.

When a reaction is exothermic it

a)

absorbs heat, and it feels cold to the touch

b)

absorbs heat, and it feels hot to the touch

c)

gives off heat and it feels cold to touch

d)

gives off heat and it feels hot to touch

78.

When a hydrate like MgSO4 x 7H2O is heated

a)

oxygen is released

b)

water is released

c)

MgSO4 is released

79.

Which of the following is not a solution

a)

water

b)

air

c)

brass

d)

soda

80.

Which of the following is not a solution

a)

water

b)

air

c)

brass

d)

soda

81.

The inner blue cone represents

a)

the hottest part of a Bunsen burner flame

b)

the coldest part of a Bunsen burner flame

82.

This is used to hold a crucible on the ring of a ring stand

a)

magnet

b)

pipe stem triangle

c)

wire gauze

83.

When heating a hydrate in a Bunsen burner, you might place the hydrate in this

a)

crucible

b)

centrifuge

c)

wire guaze

84.

This is used to accurately determine the mass of an object

a)

crucible

b)

graduated cylinder

c)

analytical balance

85.

When heating up a hot water bath a beaker is placed on this

a)

wire gauze

b)

pipe stem triangle

c)

centrifuge

86.

A mixture of iron and sulfur could best be separated with

a)

a centrifuge

b)

a funnel

c)

a magnet

87.

How many atoms of oxygen are in a 3 formula units of iron nitrate Fe(NO3)3

a)

3

b)

9

c)

18

d)

27

88.

What color of viable light possesses the least energy

a)

violet

b)

yellow

c)

red

d)

blue

89.

A hydrate that has had all it water removed through heating would than be called

a)

amphoteric

b)

dehydrous

c)

anhydrous

d)

a supernatant

90.

Meter/Seconds would be the units of

a)

wavelength

b)

frequency

c)

speed of light

91.

Hertz is a unit for

a)

wavelength

b)

freqeuncy

c)

speed of light

92.

Joule is the Si unit

a)

energy

b)

wavelength

c)

speed of light

93.

Which elements would have electrons in the d-block

a)

nitrogen

b)

sodium

c)

sliver

94.

which is the correct way to describe iron in the gas phase

a)

iron gas

b)

iron vapor

95.

If 12 grams of carbon combines with oxygen to form 44 grams of carbon dioxde how many grams of oxygen are used

a)

12

b)

24

c)

32

d)

4

96.

Which man proposed atomic orbitals

a)

Bohr

b)

Schrodinger

c)

DeBroglie

97.

As you go across a period atomic radii

a)

get bigger because of the extra electrons

b)

get smaller because of the increase in the nuclear pull

c)

get bigger because of the increase in the nuclear pull

d)

get smaller of the extra electrons

98.

The most reactive elements on the perdic table

a)

are found on the far right and far left

b)

are transition metals

c)

all elements are equally reactive

99.

Which of the following elements would have the largest atomic radius

a)

Al

b)

Ga

c)

In

d)

Tl

100.

Which family has the lowest ionization energy

a)

Alkali Metals

b)

Alkaline Earth Metals

c)

Halogens

d)

Noble Gasses

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