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End of 1st 9wk Exam Review

Total questions: 65

Worksheet time: 3hrs 23mins

Name
Class
Date
1.

What does the subscript in a chemical formula tell you? (a)  

Choose from the below words
How many molecules are present
How many atoms are present
How many elements are present
How many neutrons are present
2.

How many elements are in this chemical formula?

H2SO4H_2SO_4  

a)

1

b)

2

c)

3

d)

4

3.

What is the total number of atoms in this formula? H2O2H_2O_2  

a)

2

b)

4

c)

3

4.

Which of the following is a molecule of a compound?

a)

H2H_2

b)

Cl2Cl_2

c)

H2OH_2O

d)

F2F_2

5.

How many atoms of Carbon are in this formula? C6 H12O6C_{6\ }H_{12}O_6  

a)

6

b)

1

c)

12

6.

Is this an element or a compound? CaSO4CaSO_4  

a)

Element

b)

Compound

7.

Which element has the greatest number of atoms? AgNO3AgNO_3  

a)

Silver

b)

Gold

c)

Nitrogen

d)

Oxygen

8.

How many elements are in this chemical formula? NaHCO3NaHCO_3  

a)

1

b)

2

c)

3

d)

4

9.
This model represents what chemical formula?
a)
N4H
b)
NH
c)
N2H2
d)
NH4
10.

Which of the following molecules has the formula CH2O?

a)
b)
c)
d)
11.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
12.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
13.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
14.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
15.

Coefficients in chemical formulas...

a)

are found at the beginning of a formula and multiply just the first atom

b)

are found at the end of a formula and multiply EVERYTHING!

c)

are found at the end of a formula and multiply only elements inside the parentheses.

d)

are found at the beginning of a formula and multiply EVERYTHING!

16.

The subscript refers to the element it is __________.

a)

on top of

b)

in front of

c)

behind

d)

underneath

17.

If there is no subscript, there is ______ atom(s) of that element.

a)

0

b)

2

c)

1

d)

1 million

18.

How many MOLECULES are in 5C₉H₈O₈ ?

a)

5

b)

25

c)

125

d)

16

19.

The coefficient in 3H2O is:

a)

3

b)

8

c)

1

d)

2

20.

In order for an equation to be balanced, there must be ...

a)

an equal amount of atoms on both sides

b)

a greater mass on the product side

c)

a greater mass on the reactant side

d)

elements with the same atomic # on both sides

21.

The substances that go into a reaction are called the _______.

a)

products

b)

reactants

22.

So, the Law of Conservation of Mass would tell us that the mass of all the REACTANTS must __________ the mass of all PRODUCTS in a chemical reaction.

a)

equal

b)

be greater than

c)

be less than

23.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
24.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
25.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
26.

Attraction between molecules of the same substance is known as (a)   .

Choose from the below words
Buffer
Adhesion
Hydrogen Bond
Cohesion
27.

Attraction between differnt kinds of molecules.

a)

Cohesion

b)

Carbon Bond

c)

Hydrogen Bond

d)

Adhesion

28.

Scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution.

a)

Hydrogen Bond

b)

pH Scale

c)

Acid

d)

Base

29.

A solution with a pH more than 7. (High OH- concentration)

a)

Acid

b)

Buffer

c)

Hydrogen Bond

d)

Base

30.

A solution with a pH less than 7. (high H+ concentration)

a)

pH Scale

b)

Base

c)

Acid

d)

Buffer

31.

The attraction between water molecules is ___.

a)

adhesion

b)

cohesion

32.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
33.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
34.

An attraction between molecules of different substances is called...

a)

adhesion

b)

cohesion

35.

Elements

a)

are made of two or more types of atoms bonded together

b)

are made of one type of atom

c)

are made of two or more types of molecules

d)

are always individual atoms

36.
Two or more substances in the same place but NOT chemically combined or in a specific ratio is called —
a)
a compound 
b)
a pure substance
c)
an element
d)
a mixture
37.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
38.

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

39.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
40.

The large numbers before a chemical formula that are used as multipliers are known as __________________.

a)

element symbols

b)

exponents

c)

coefficients

d)

subscripts

41.

The small numbers under and to the right of element symbols in a formula are called _________________.

a)

element symbols

b)

exponents

c)

coefficients

d)

subscripts

42.

The materials we start with in a reaction are known as __________________.

a)

chemicals

b)

reactants

c)

products

d)

creations

43.

The materials we end with in a reaction are known as __________________.

a)

chemicals

b)

reactants

c)

products

d)

creations

44.

What is the coefficient in the chemical formula?

a)

2

b)

N

c)

H

d)

3

45.

What is the subscript in the formula for H?

a)

2

b)

N

c)

H

d)

3

46.
Fe2O3 has
a)
2 Iron atoms, 3 oxygen atoms
b)
6 iron atoms, 6 oxygen atoms
c)
3 iron atoms, 2 oxygen atoms
d)
1 iron atom, 6 oxygen atoms
47.
What type of force is shown in the picture?
a)
The Cat force
b)
Star Wars Force
c)
Unbalanced force
d)
Balanced  force
48.
What is a Force?
a)
The distance
b)
Mass
c)
A push or pull
d)
Give me a  failing grade 
49.
An _______ force must act on an object for it to CHANGE it's motion
a)
balanced
b)
unbalanced
c)
gravitational
d)
electrical
50.

If the net force is equal to zero, the forces acting on the object are

a)

balanced

b)

unbalanced

51.
What is the net force in this picture?
a)
50 Newtons to the right
b)
950 Newtons to the right
c)
950 Newtons to the left
d)
50 Newtons to the left
52.

What can the boy do to make the girl swing higher?

a)

Push her with less force

b)

Push her with more force

c)

Push her with the same amount of force

d)

The boy cannot make the girl swing any higher

53.

Which of the following is an example of an unbalanced force?

a)
b)
c)
d)
54.

According to Newton's Second Law of Motion, _____.

a)

F = mv

b)

F = pv

c)

F = ma

d)

F = pa

55.

How many elements are in this chemical formula?

H2SO4H_2SO_4  

a)

1

b)

2

c)

3

d)

4

56.

Is this an element or a compound? CaSO4CaSO_4  

a)

Element

b)

Compound

57.
This model represents what chemical formula?
a)
N4H
b)
NH
c)
N2H2
d)
NH4
58.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
59.
What is the standard unit force is measured in?
a)
Newtons
b)
pounds
c)
grams
d)
meters
60.
What is Newton's Third Law?
a)
Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
b)
Force = mass x acceleration
c)
For every action there is an equal and opposite reaction
61.
When you push a boat off from the dock, you are demonstrating Newton's 3rd Law of Motion. It simply states that for every action there is an equal and opposite _______________?
a)
Motion
b)
Change
c)
Reaction
d)
Push
62.
a)
1st
b)
2nd
c)
3rd
63.
a)
1st
b)
2nd
c)
3rd
64.
a)
1st
b)
2nd
c)
3rd
65.
An automobile you are riding in suddenly stops, but you continue to go forward.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion

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