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EI3 Quiz

Total questions: 71

Worksheet time: 56mins

Name
Class
Date
1.

In the chemical formula C12H22O11C_{12}H_{22}O_{11}  , how many elements are there?

a)

1

b)

2

c)

3

d)

4

2.

In the chemical formula C12H22O11C_{12}H_{22}O_{11}  , how many C atoms are there?

a)

12

b)

22

c)

11

d)

45

3.

In the chemical formula C12H22O11C_{12}H_{22}O_{11}  , how many O atoms are there?

a)

12

b)

22

c)

11

d)

45

4.

In the chemical formula C12H22O11C_{12}H_{22}O_{11}  , how many H atoms are there?

a)

12

b)

22

c)

11

d)

45

5.

What is the TOTAL number of atoms in the chemical formula C12H22O11C_{12}H_{22}O_{11}  ?

a)

12

b)

22

c)

11

d)

45

6.

Which of the following substances CANNOT be broken down into simpler substance? ?

a)

NaNa  

b)

H2OH_2O  

c)

C6H12O6C_6H_{12}O_6  

d)

COCO  

7.

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

a)

During a chemical reaction, matter is destroyed.

b)

During a chemical reaction, the total number of atoms increases.

c)

 During a chemical reaction, one or more new substances are formed.

d)

During a chemical reaction, the total amount of matter stays the same.

8.

What happens to the total mass of the substances after a chemical reaction?

a)

It decreases.

b)

It increases.

c)

 It remains the same.

d)

It increases then decreases.

9.

In a chemical reaction, the number of atoms in the products will always equal which amount?

a)

the number of atoms in the reactants

b)

half of the number of atoms in the reactants

c)

twice the number of the atoms in the reactants

d)

thrice the number of the atoms in the reactants

10.

Jin bought a heat pack that weighs 15 g. He shook it so it would release heat to warm his hands. The release of heat indicates a chemical reaction took place in a closed system. What would be the mass of the heat pack after the chemical reaction?

a)

5 g

b)

10 g

c)

12 g

d)

15 g

11.

The chemical formula for baking soda is NaHCO3NaHCO_3   . How many O atoms does it have?

a)

1

b)

2

c)

3

d)

4

12.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
13.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
14.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
15.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same  number of atoms
c)
Same subscripts
d)
Same coefficients
16.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
17.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
18.
Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?
a)
50 g
b)
100 g
c)
200 g
d)
400 g
19.

How many atoms do you have in the compound 2MgCl2?

a)

2 atoms

b)

4 atoms

c)

6 atoms

d)

8 atoms

20.

How many Ca (Calcium) atoms are found in Ca(OH)2?

a)

5 atoms

b)

3 atoms

c)

2 atoms

d)

1 atom

21.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

22.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

23.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

24.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

25.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
26.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
27.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
28.
A chemical reaction is balanced when
a)
both sides have the same elements
b)
Both sides have the same  number of atoms
c)
Same subscripts
d)
Same coefficients
29.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
30.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
31.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
32.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
33.
Measure of the amount of matter 
a)
mass
b)
volume
c)
weight
d)
density
34.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
35.

The Law of Conservation of Mass states Matter is NEITHER created nor destroyed.

a)

True

b)

False

36.

The Coefficient (3) in the Chemical Formula, 3H2O, tells you how many _____________ there are.

a)

Atoms of Hydrogen

b)

Atoms of Oxygen

c)

Atoms of Water

d)

Molecules of Water

37.

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

a)

During a chemical reaction, matter is destroyed.

b)

During a chemical reaction, the total number of atoms increases.

c)

 During a chemical reaction, one or more new substances are formed.

d)

During a chemical reaction, the total amount of matter stays the same.

38.
A precipitate is a 
a)
liquid that forms when two solids are reacted
b)
a solid that forms when two liquids are mixed
c)
a gas that forms when vinegar and baking soda react
d)
a change of color in a solution
39.
Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?
a)
200 g
b)
700 g
c)
1,100 g
40.
24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride
a)
62 
b)
38
c)
24
d)
14
41.

Mixing baking soda and vinegar causes bubbles of carbon dioxide gas to form. Which of the following statements is true?

a)

A chemical change happened because a color change occurred

b)

A chemical change happened because a precipitate formed

c)

A physical change happened because the vinegar boiled into a gas

d)

A chemical change happened because a new gas was released

42.

Which BEST explains why the total mass of the product(s) would be LESS than the total mass of the reactant(s) after a chemical reaction?

a)

Gases were released into the air during the reaction

b)

Precipitates were created during the reaction

c)

Atoms involved in the reaction lost mass

d)

A physical change has occurred

43.

A student mixed some food coloring into some water. Which of the following statements is true?

a)

A chemical change happened because a new substance formed

b)

A chemical change happened because a precipitate formed

c)

No chemical change happened because no new substance formed.

d)

No chemical change happened because the water changed phase

44.

In any chemical reaction, the total amount of matter before the reaction and the total amount of matter after the reaction must STAY THE SAME according to:

a)

The Law of Equality

b)

The Law of Conservation of Energy

c)

The Law of Balance

d)

The Law of Conservation of Mass

45.

17. What is a precipitate?

a)

A solid that can be formed by combining two liquids

b)

A change in temperature

c)

A measuring tool

d)

An element

46.

Which of the following shows ONE example of a physical change and ONE example of a chemical change?

a)

Dissolving powder and shredding paper

b)

Freezing water and burning coal

c)

Rusting iron and baking a cake

d)

Boiling water and melting wax

47.

CO2 + H2O ----> C6H12O6 + O2

What are the products of the reaction?

a)

CO2 and O2

b)

C6H12O6 and H2O

c)

CO2 and H2O

d)

C6H12O6 and O2

48.

Which of the following is responsible for a chemical change?

a)

cooling down

b)

crushing

c)

a chemical reaction

d)

melting

49.

CO2 + H2O ----> C6H12O6 + O2

What are the reactants of the reaction?

a)

CO2 and O2

b)

C6H12O6 and H2O

c)

C6H12O6 and O2

d)

CO2 and H2O

50.

Hand-warmers work by creating heat by creating a reaction between iron and oxygen. How do you know that a chemical reaction is happening without being able to see a new compound being formed?

a)

There is no chemical reaction happening

b)

A precipitate is formed

c)

There is a change in temperature

d)

There is a change in color

51.

Which of the following is an example of a physical change?

a)

Iron rusting

b)

Melting ice into water

c)

Lithium reacting with water

d)

Wood burning and releasing smoke

52.

Instant ice packs work by allowing ammonium nitrate to break down in water resulting in very cold products. How do you know a reaction has occurred?

a)

A gas has been released

b)

A change in temperature

c)

A change in color

d)

A precipitate has formed

53.

How are reactants and products different from one another?

a)

Products are the ingredients that go into a reaction; reactants are the results that come out

b)

Reactants and products are the same

c)

Reactants are the ingredients that go into a reaction; products are the results that come out

d)

There is no such thing as reactants and products

54.

Why is boiling water into water vapor a physical change and not a chemical change?

a)

The color changed making it invisible

b)

Water boiling is actually a chemical change, not a physical change

c)

Physical and chemical changes are the same thing

d)

It is still water, so no new substance is made

55.

Which of the following is a sign that a chemical change or a chemical reaction has taken place?

a)

A liquid substance takes the form of its container

b)

The substance boils while being heated

c)

The substance condenses when cooled

d)

Bubbles form of a new gas being released

56.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
57.

A balanced force will cause an object to move.

a)

true

b)

false

58.
If there are two forces going in the SAME direction, you would ...?
a)
(-) Subtract the forces
b)
(+) Add the forces
c)
Neither
d)
(x) Multiply
59.

Forces that have a net force of Zero (0) are ______________.

a)

Balanced force

b)

Unbalanced force

60.

How will this object move?

a)

It won't move.

b)

It will move to the right.

c)

It will move to the left.

d)

It will move up.

61.

How will this object move?

a)

It won't move.

b)

It will move to the left.

c)

It will move in both directions.

d)

It will move to the right.

62.

What is the net force?

a)

30 N left

b)

25 N right

c)

55 N right

d)

5 N left

63.

What is the net force?

a)

1000 N upward

b)

500 N right

c)

40 N right

d)

0 N

64.

These forces are ______________

a)

Balanced Force

b)

Unbalanced Force

65.

What Is the Net Force?

a)

0 N

b)

10 N right

c)

10 N left

66.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
67.
A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?
a)
Balanced Forces, Constant Speed
b)
Balanced Forces, Acceleration
c)
Unbalanced Forces, Constant Speed
d)
Unbalanced Forces, Acceleration
68.
Which of the blocks above has balanced forces acting on it?
a)
A
b)
B
c)
C
d)
D
69.
An airplane is travelling North through the sky at a constant speed when turbulence causes it to take a different route, changing its direction. Explain the forces at work on this plane.
a)
Unbalanced, because the plane is moving forward, not backwards
b)
Unbalanced, because the speed is constant and there is a change in direction
c)
Balanced, because the plane is not falling to a lower altitude
d)
Unbalanced, because the plane is in motion
70.

Which of the blocks above has balanced forces acting on it?

a)

A

b)

B

c)

C

d)

D

71.
The FORCE that PULLS things down or back to EARTH.
a)
Speed
b)
Gravity

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