Question 1

What does this symbol mean in a chemical equation: →

Accepted Answer

yield

Answer

equal to

Answer

in addition to

Question 2

Where are the reactants and products written in a chemical equation?

Accepted Answer

reactants - left, products - right

Answer

they are both on the same side

Answer

reactants - right, products - left

Question 3

True or False: Melting ice cubes is a form of an endothermic process

Accepted Answer

true

Answer

false

Question 4

How many atoms are in the compound: NaCl

Accepted Answer

2

Answer

3

Answer

1

Question 5

How many sodium atoms are in this compound?

Accepted Answer

3

Answer

5

Answer

1

Question 6

What is the endothermic reaction where plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen?

Accepted Answer

photosynthesis

Answer

carbon dioxide

Answer

sunlight

Question 7

What does the Greek word "Endo" mean?

Accepted Answer

within

Answer

to leave

Answer

outside

Answer

to enter

Question 8

What does the Greek word "Exo" mean?

Accepted Answer

outside

Answer

to leave

Answer

to enter

Answer

within

Question 9

True or False - This chemical equation represents an endothermic reaction:

Accepted Answer

true

Answer

false

Question 10

Balance the equation. List the coefficients in order.

Accepted Answer

2, 3, 2

Answer

1, 2, 3

Answer

1,3, 2

Question 11

Balance the equation. List the coefficients in order.

Accepted Answer

1, 1, 2

Answer

2, 2, 2

Answer

1, 3, 2

Question 12

What are endothermic reactions?

Accepted Answer

Chemical reactions that absorb or take in energy.

Answer

Chemical reactions that release energy.

Question 13

What are exothermic reactions?

Accepted Answer

Chemical reactions that release energy.

Answer

Chemical reactions that absorb or take in energy.

Question 14

True or False: Baking bread and burning sugar are both exothermic reactions

Accepted Answer

false

Answer

true

Question 15

List the subscripts on the side of the reactants.

Accepted Answer

5, 2

Answer

2

Answer

2, 2, 5

Answer

9

Question 16

List the coefficient on the side of the products.

Accepted Answer

2

Answer

4, 6 , 3, 2

Answer

1, 1

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