Mr. Chun's Chemical Reaction/Equation Quiz

CH₄ + 2O₂ ---> CO₂ + 2 H₂O

Count the atoms in the reactants

• C= 4 H=4 O=1

• C= 1 H=4 O=4

• C=1 H=4 O=1

• C=2 H=8 O=8

CH₄ + 2O₂ ---> CO₂ + 2 H₂O

Count the atoms in the products

• C=1 H=4 O=1

• C=4 H=1 O=1

• C=1 H=4 O=4

• C=2 H=8 O=8

In the following equation, what are the REACTANTS?

2C₃H_{6 .} + 9O_{2 .} ---> 6CO₂ + 6H₂O

propane + oxygen ---> carbon dioxide and water

• propane and oxygen

• carbon dioxide and water

• carbon dioxide

• propane

In the following equation, what are the PRODUCTS?

2C₃H_{6 .} + 9O₂ ---> 6CO₂ + 6H₂O

propane + oxygen ---> carbon dioxide and water

• propane and oxygen

• carbon dioxide and water

• propane

• water

If the total mass of the reactants measures 10 g, what would be the total mass of the products?

• 10 g

• 20 g

• 5 g

• None of the above

Why are chemical equations always balanced? Select ALL that apply.

• Matter cannot be created.

• Matter cannot be destroyed.

• Matter can only be rearranged/conserved.

• Matter doesn't matter.

What are reactants?

• substance that make a chemical reaction go faster

• substances that form a gas when heated

• substances that react and turn into new substances

• substances that are formed during a chemical reaction

What are products?

• substances that make a chemical reaction go faster

• substances that make a chemical reaction go slower

• substances that react and form new substances

• substances that are formed during a chemical reaction

What sign of a change do you see when we melt ice?

• gas production
• heat production
• precipitate formed
• change in state of matter

How do you know Baking Soda and Vinegar reaction was endothermic?

• The temperature increases (goes up)

• The temperature decreases (goes down)

• The temperature stays the same

• Everything stops