Free Printable Exam 3: Chemistry

Worksheets

Exam 3: Chemistry

Total questions: 42

Worksheet time: 27mins

Name

Class

Date

If a track athlete were to double their running speed, they would also double their

momentum

potential energy

both momentum and potential energy

A basketball rolling down a hill has more momentum than a person running down a hill

True

False

A simple machine cannot multiply

force

distance

energy

none of these, they can all be multiplied

Applying a force over a long period of time will lead to larger changes in momentum

True

False

An (a) collision results in the transformation of energy from one object to the other without the coupling of objects.

You throw a basketball with a mass of 5.4 kg. The ball leaves your hand at 20 m/s. What is the kinetic energy of the ball?

1080 J

108 J

2160 J

148.15 J

You exert a force of 6.2 N on a large box to slide it across a table. If you do 2.3 J of work in the process, how far have you moved the book?

0.37 m

2.69 m

14.26 m

What is the momentum of a 3453 kg car moving at 12 m/s?

41,436 kg m/s

287.75 kg m/s

0.0035 kg m/s

41,634 kg m/s

A child pulls a sled up a hill. The child does 405 J of work on the sled. If the child walks 15 m up the hill, how large of a force must the child exert?

27 N

6075 N

0.037 N

10.

A student who weighs 425 N climbed a five story building, 35 meters above in 60 seconds. What was their power?

247.92 W

4.94 W

728.6 W

11.

An oven that is 78 % efficient consumes 425 kWh of energy. How much useful energy does it provide?

331.5 kWh

18.4 kWh

3,315,000 kWh

12.

An oven that is 80% efficient provides 5200 J of useful energy. How much energy does it consume?

6500 J

4160 J

0.65 J

41.60

13.

A vibration is described in terms of (a)

14.

An electric razor completes 60 cycles every second. What is its frequency? What is its period?

60 Hz;

$\frac{1}{60}$ sec

$\frac{1}{60}$ Hz;

60 sec

15.

A wave has a frequency of 30 Hz and a wavelength of 2 m. What is the speed of the wave?

60 m/s

0.06 m/s

15 m/s

16.

A wave has a frequency of 10 Hz and a speed of 55 m/s. What is the wavelength of the wave?

5.5 m

550 m

0.2 m

200 m

17.

(a) occurs when the frequency of forced vibrations on an object matches the natural frequency of that object

18.

Which of the following does the sound of speed NOT depend on (there may be more than one answer)

wind conditions

temperature

frequency

loudness

humidity

19.

Light and all electromagnetic waves are _______ waves

transverse

longitudinal

20.

the source of vibrating electromagnetic waves is vibrating...

electrons

atoms

molecules

energy fields

21.

Light has both wave and particle nature. Light behaves as a particle when

it travels from one place to the other

it interacts with matter

it is visible

none of these

22.

what coefficiants balance this equation:

$P_{4\ }\ +\ \ \ \ H_{2\ \ }\rightarrow\ \ \ \ PH_3$

1,6,4

4,2,3

1,4,4

2,10, 8

23.

Rainwater is naturally acidic because it contains Carbonic acid

True

False

24.

Corrosion and Combustion are endothermic reactions

True

False

25.

Which of the following is an example of a strong acid

Acetic acid

Hydrofluoric acid

Nitric acid

Water

26.

Acid–base reactions involve the transfer of a proton.

Oxidation–reduction reactions involve the transfer of an electron.

True

False

27.

The diagram shows three vehicles travelling along a straight road at 14 m/s.

Which vehicle has the greatest momentum?

Motorcycle

Lorry

Van

28.

Reaction rates are affected by all of the following except

Presence of a catalyst

Color of the reactants

Concentration of the reactants

Temperature of the reactants

29.

Endothermic reactions

Endothermic reactions release heat.

Endothermic reactions do not involve heat.

Endothermic reactions occur spontaneously without energy input.

Endothermic reactions absorb heat.

30.

Does an acid donate or accept a proton? what about a base?

An acid accepts a proton; a base donates a proton.

An acid neither donates nor accepts a proton; a base does the same.

An acid donates a proton; a base accepts a proton.

An acid donates electrons; a base accepts electrons.

31.

What is the relationship between the hydroxide ion and water molecule?

A hydroxide ion is a water molecule minus a hydrogen nucleus

a hydroxide ion is a water molecule plus a proton

a hydroxide ion is a water molecule plus two extra electrons

a hydroxide ion and a water molecule are the same thing

32.

Sound travels faster in which of the following mediums:

liquid

gas

solid

sound travels at the same speed no matter the medium

33.

Which of the following is a strong acid

acetic acid

hydrochloric acid

phosphoric acid

citric acid

34.

ph is a measure of the concentration of (a) ions.

35.

Which of the following elements is most likely to be oxidized?

Chlorine

Sodium

Oxygen

Nitrogen

36.

Which of the following elements is most likely to be reduced?

Carbon

Nitrogen

Fluorine

Oxygen

37.

Jorge noticed a collision outside the coffee shop where two cars collided and stuck together. What type of collision did he observe?

Elastic

Inelastic

Completely inelastic

none

38.

kinetic energy

energy of motion

stored energy

conservation of energy

energy that is requires no movement

39.

Work is done when a weightlifter holds a barbell still above his head.

True

False

40.

Balance this equation...
HgO --> Hg + O₂

It is balanced

2HgO --> Hg + O₂

2HgO --> 2Hg + O₂

41.

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

1, 2,1

already balanced

2,1,1

1,1,2

42.

Fill in the blanks with coefficient:
PCl₅+_ H₂O→_ HCl+H₃PO₄

4, 5

1, 6

3, 8

2,2

100 %

Exam 3: Chemistry

Total questions: 42

Worksheet time: 27mins

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