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Chemistry Mid Term Review

Total questions: 65

Worksheet time: 33mins

Name
Class
Date
1.

All of the following are pieces of lab safety equipment except

a)

lab goggles

b)

chemical apron

c)

lab coat

d)

hair tie

2.

The chemical shower

a)

is a fun thing to try out

b)

has warm water that gently rinses you

c)

has a flow rate of approximately 20 times your home shower

d)

is not a required safety device

3.

A eye wash station

a)

can be plumbed or portable

b)

is for washing your lab goggles

c)

can be used to rinse off any part of you that is exposed to chemicals

d)

is located outside the lab

4.

lab safety rules include all but

a)

closed toe shoes are necessary

b)

no drinks except water are allowed in the lab

c)

loose clothing should be removed or secured

d)

no horseplay

5.

qualitative data is

a)

numerical data

b)

observations

c)

both numbers and observations

d)

anything you write down

6.

quantitative data is

a)

numerical data

b)

observations

c)

both numbers and observations

d)

anything you write down

7.

measuring the length of an object is

a)

quantitative data

b)

qualitative data

c)

statistical data

d)

always in inches

8.

asking people to describe their experience would be considered

a)

qualitative data

b)

quantitative data

c)

analysis

d)

a hypothesis

9.

A control in an experiment is

a)

the x axis of a graph

b)

something that changes as we do the experiment

c)

something that gives a point of comparison/baseline

d)

is not necessary in all experiments

10.

A lab report should include

a)

a hypothesis

b)

a conclusion

c)

the procedure

d)

data

e)

all of these

11.

A hypothesis

a)

must always be correct

b)

states what you know will happen

c)

is an educated guess about what will happen

d)

must always be written after the experiment is finished

12.

A conclusion to a lab report

a)

is part of the pre-lab

b)

tells whether or not my hypothesis was correct

c)

sums up the lab purpose and results

d)

should be one sentence or less in length

13.

We strive to have data that is

a)

precise

b)

accurate

c)

both accurate and precise

d)

neither accurate nor precise

14.

What is precision?

a)

Significant figures, the number of digits that carry real information about a measurement.

b)

how many digits after the decimal your calculator tells you

c)

how close to the correct answer you are

d)

how repeatable your answer is

15.

What is accuracy?

a)

Significant figures, the number of digits that carry real information about a measurement.

b)

how many digits after the decimal your calculator tells you

c)

how close to the correct answer you are

d)

how repeatable your answer is

16.

Put 0.00345 in scientific notation

a)

345

b)

it's already correct

c)

3.45 x 103

d)

3.45 x 10-3

17.

Put 345000 in scientific notation

a)

345

b)

it's already correct

c)

3.45 x 105

d)

3.45 x 10-5

18.

Round 0.004567 to 4 significant digits

a)

it's already correct

b)

0.0045

c)

0.0046

d)

4.6 x 10-3

19.

Round 4567 to 2 significant digits

a)

it's already correct

b)

4500

c)

46

d)

4.6 x 103

20.

The graduated cylinder reads

a)

20mL

b)

25mL

c)

24mL

d)

100mL

21.

The bottom of the meniscus reads

a)

2.5 mL

b)

2.7mL

c)

26mL

d)

8mL

22.

What is NOT a unit of temperature?

a)

Fahrenheit

b)

Celcius

c)

Kelvin

d)

atmosphere

23.

Convert 25C to Kelvin

a)

25 K

b)

298K

c)

250K

d)

82K

24.

Kelvin is a measure of

a)

temperature

b)

pressure

c)

current

d)

volume

25.

32 degrees Fahrenheit is the same as

a)

0 Kelvin

b)

0 Celcius

c)

freezing point of water

d)

boiling point of salt water

26.

An element is defined by the number of _____________ it has.

a)

protons

b)

neutrons

c)

electrons

d)

quarks

27.

ions differ in the number of

a)

protons

b)

neutrons

c)

electrons

d)

nucleus

28.

isotopes differ in the number of

a)

protons

b)

neutrons

c)

electrons

d)

nucleus

29.

14C

a)

is elemental Carbon

b)

is an isotope of Carbon

c)

is an ion of Carbon

d)

is an isotope of Calcium

30.

Na+1

a)

is a sodium isoptope

b)

is a sodium ion

c)

is a sodium atom

d)

is a sodium molecule

31.

Na+1

a)

has lost an electron

b)

has gained an electron

c)

is neutrally charged

d)

has gained a proton

32.

An example of a physical change is

a)

melting

b)

gas producing

c)

a change in pH

d)

heat being produced

33.

An example of a chemical change is

a)

melting

b)

gas producing

c)

a change in pH

d)

boiling

34.

An example of a homogenous mixture is

a)

ocean water

b)

a jar of coins

c)

a bowl of candy

d)

milk

35.

An example of a heterogenous mixture is

a)

ocean water

b)

a jar of coins

c)

a bowl of candy

d)

all of these

36.

I can separate a solid from a liquid by

a)

distillation

b)

filtration

c)

freezing

d)

picking out the particles

37.

I can separate liquids by boiling point using

a)

distillation

b)

filtration

c)

freezing

d)

sublimation

38.

Using the Law of Conservation of Mass find the mass of oxygen in 56g of the compound CaO. There are 40g of Ca in the compound.

a)

40g

b)

56g

c)

96g

d)

16g

39.

What subatomic particles are found in the nucleus?

a)

protons

b)

neutrons

c)

electrons

d)

alpha particles

40.

electrons exist in

a)

orbits around the nucleus

b)

orbitals around the nucleus

c)

inside the nucleus

d)

nowhere in the atom

41.

The number of neutrons can be calculated by

a)

taking the atomic mass and subtracting the atomic number

b)

adding up the number of protons and electrons

c)

subtracting the atomic mass from the number of protons

d)

adding the atomic mass and the atomic number

42.

electrons have a

a)

positive charge

b)

negative charge

c)

no charge

d)

can have either charge

43.

Group 7 elements have

a)

1 valence electron

b)

5 valence electrons

c)

3 valence electrons

d)

7 valence electrons

44.

Group 1 elements make

a)

positive ions

b)

negative ions

c)

can make both positive and negative ions

d)

do not make ions

45.

Noble gasses make

a)

positive ions

b)

negative ions

c)

can make both positive and negative ions

d)

do not make ions

46.

The correct name for MgCl2 is

a)

Magnesium chloride

b)

Magnesium (II) chloride

c)

Magnesium dichloride

d)

Monomagnesium dichloride

47.

The correct name of P4O10 is

a)

Phosphorous oxide

b)

Diphosphorous decaoxide

c)

Tetraphosphorous decaoxide

d)

Phosphate

48.

The correct name for CuCl2 is

a)

Copper chloride

b)

Copper (II) chloride

c)

Cuperic dichloride

d)

Monocuperous dichloride

49.

Choose the ionic compounds

a)

NaCl

b)

CuI2

c)

CCl4

d)

PO4

50.

In a covalent bond, atoms

a)

share electrons equally

b)

share electrons unequally

c)

transfers electrons to form ions

d)

causes dipoles

51.

In a polar covalent bond, atoms

a)

share electrons equally

b)

share electrons unequally

c)

transfers electrons to form ions

d)

causes dipoles

52.

In an ionic bond, atoms

a)

share electrons equally

b)

share electrons unequally

c)

transfers electrons to form ions

d)

causes dipoles

53.

The Law of Conservation of Matter helps us

a)

balance equations

b)

find the mass of compounds

c)

find the percent composition of an element in a compound

d)

find the molecular formula

54.

The coefficients in a balanced equation tell us

a)

the number of atoms in a compund

b)

the number of molecules used or produced in a reaction

c)

the ratio of molecules in a reaction

d)

the number of atoms in a reaction

55.

The number 4 in P4Cl2 tells us

a)

there are 4 molecules

b)

there are 4 phosphorous atoms

c)

there are 4 chlorine atoms

d)

none of these are true

56.

Lewis dot diagrams

a)

show all the electrons in an element

b)

show only the valence electrons

c)

show only bonded electrons in a compound

d)

show only lone pairs of electrons

57.

We can tell the 3D geometry of molecule using the Lewis Dot Diagram.

a)

True

b)

False

58.

CO3-2 is called

a)

carbon trioxide

b)

carbonate ion

c)

carbonic acid

d)

carbon oxyide

59.

Identify the type of reaction: Ca + MgCO3 --> Mg + CaCO3

a)

single replacement

b)

double replacement

c)

synthesis

d)

decomposition

e)

combustion

60.

Identify the type of reaction: CaSO4 + MgCO3 --> MgSO4 + CaCO3

a)

single replacement

b)

double replacement

c)

synthesis

d)

decomposition

e)

combustion

61.

Identify the type of reaction: MgCO3 --> Mg + CO2 + O2

a)

single replacement

b)

double replacement

c)

synthesis

d)

decomposition

e)

combustion

62.

Identify the type of reaction: Ca +SO2 + O2 --> CaSO4

a)

single replacement

b)

double replacement

c)

synthesis

d)

decomposition

e)

combustion

63.

Identify the type of reaction: C3H6 +O2 --> CO2 + H2O + heat

a)

single replacement

b)

double replacement

c)

synthesis

d)

decomposition

e)

combustion

64.

exothermic means

a)

It feels hot when the reaction is occurring

b)

it feels cold when the reaction is occurring

c)

energy is released as heat

d)

energy is stored in chemical bonds

65.

endothermic means

a)

It feels hot when the reaction is occurring

b)

it feels cold when the reaction is occurring

c)

energy is released as heat

d)

energy is stored in chemical bonds

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