Chemical Equations/Thermal Energy & Chemical Processes

​Chemical Equations Basics - Use the video to answer the questions on slides 4 through 7.

Multiple Choice

The '+' on the reactant side of a chemical equation means that

• there are multiple molecules being combined

• the number of molecules are increasing in the reaction

• energy is being added

Multiple Choice

The word 'yield' which is represented by the arrow means

• the direction the molecules are moving

• to produce

• to react with

Multiple Choice

The large number in front of a chemical formula is called a

• reactant

• compound

• coefficient

Multiple Choice

Atoms are neither created nor destroyed in a chemical reaction. This means the total number of atoms are

• conserved

• increased

• decreased

​Use the video on slide 11 to answer the questions on slides 12 through 17.

Multiple Choice

The small number to the right of an elemental symbol  ( H₂₎ is called?

•  a subscript 

• a coefficient 

• a variable 

• a divisor 

Multiple Choice

In the chemical formula CaCl_{2, how man Chlorine atoms are there?}

• 3

• 4

• 1

• 2

Multiple Choice

In the chemical formula CO₂ how many Carbon atoms exist?

• 1

• 2

• 3

• 4

Multiple Choice

How many atoms are there TOTAL in:
H₂SO₄

• 6

• 5

• 7

• 3

Multiple Choice

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Multiple Choice

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3

• 6

• 12

• 24

​Chemical Equations Brainpop

​After viewing the video, you will answer the questions. All questions on slides 23 through 26 are based on the video.

Some text here about the topic of discussion

Multiple Choice

Which of the following is a chemical reaction?

• Sodium and chlorine atoms bond to form salt molecules

• Ice melts to form wdryater

• Carbon dioxide freezes to form dry ice

• Salt and water mix to form salt water.

Multiple Choice

2H2O  🡪  4H +  O2

• The reactants are on the right side of the arrow and the products are on the left side.

• The reactants are on the left side of the arrow and the products are on the right side.

Multiple Choice

The chemical symbol "Ni" most likely represents:

• Carbon

• Lead

• Nickel

• Antimony

Multiple Choice

How do the products of chemical reactions compare to their reactants?

• The products usually weigh more than the reactants.

• The products often have completely different properties than the reactants.

• The products usually have more atoms than the reactants.

• The products are usually more toxic than the reactants.

​Law of Conservation of Mass Brainpop

​After viewing the video, you will answer the questions. All questions on slides 29 through 36 are based on the video.

Some text here about the topic of discussion

Multiple Choice

In science, a law is:

• A rule governing what you are permitted to do.

• A generalization about how the physical universe works.

• A legal document that describes a rule of conduct.

Multiple Choice

What is true of a substace with a lot of mass?

• It contains a lot of matter

• It has a large volume

• It has a high density.

• It has a low frequency.

Multiple Choice

The law of conservation of mass says that substances can neither be created nor destroyed.

• true

• false

Multiple Choice

Mass and weight are the same thing.

• true

• false

Multiple Choice

Sodium and chlorine combine to form sodium chloride, or table salt. Sodium and chlorine are:

• Producers

• Reactants

• Products

• Yields

Multiple Choice

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

• Product

• Reactant

Multiple Choice

4 grams of hydrogen and 32 grams of oxygen will combine to form:

• 32 grams of oxygen

• 36 grams of water

Multiple Choice

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

• 4

• 6

• 8

• 10

​Endothermic & Exothermic Reactions

​

Multiple Choice

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

Multiple Choice

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

• It is an exothermic reaction
• It is an endothermic reaction
• It is made of ice
• It is dissolving your mouth

Multiple Choice

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released 

Multiple Choice

In an exothermic reaction, heat is ...

• taken in or absorbed

• given out or released

Multiple Choice

When iron nails get rusty, heat is released.  What process is this?

• Exothermic

• Endothermic

Multiple Choice

In an endothermic reaction, heat is ...

• taken in

• given out

Open Ended

Provide a response to the Factors That Affect Rates of Chemical Reactions you saw on slide 55. This can be an audio recording response or a typed response.