Chemical Reactions

A substance that is formed as the result of a chemical reaction is a __________________

• Product

• Reactant

• Starters

• Enders

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

• water freezes to form ice

• sugar dissolves in water

• gasoline burns in a car engine

• a piece of metal expands when it is heated

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

• rusting of a bicycle

• painting a house

• washing a dog

• tearing up a newspaper

Which one shows that a chemical reaction has occurred?

• dissolving

• melting

• formation of a gas

• bending

What type of change occurs when a new substance is formed that has different properties from the original substances?

• chemical change

• nuclear change

• physical change

• mutation

True or False: In a complete chemical equation, there must be the same number of atoms of each element on the reactants and products side.

• True

• False

Look at the chemical equation.

Is it written correctly to show the Law of Conservation of Mass?

• Yes

• No

How many Carbons are present on the reactant side?

• 1

• 2

• 3

• 4

How many Hydrogens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4

How many Oxygens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4