Matter Quiz #2

Which of the following is true for all chemical reactions?

• The total mass of the reactants equals the total mass of the products.

• The total mass of the products is greater than the total mass of the reactants.

• The total mass of the products decreases.

• The total mass of the reactants increases.

All of the following changes to a substance are chemical changes EXCEPT:

• fermenting

• boiling

• burning

• tarnishing

• reacting

Which of the following is a valid difference between a mixture and a compound?

• A compound is made up of more than one phase.

• A mixture can only be separated into its components by chemical means.

• A mixture must be uniform in composition.

• A compound can only be separated into its components by chemical means.

Which of the following is a true statement about compounds?

• They can be physically separated into their constituent elements.

• They have properties similar to those of their constituent elements.

• They are pure substances.

• They have variable compositions.

Which of the following CANNOT be classified as a pure substance?

• sucrose (sugar)

• nitrogen

• gold

• table salt

• air

Matter is defined as anything that:

• can be weighed on a balance

• has a definite volume

• has mass and takes up space

• has a fixed volume and weight

• has energy

Which of the following is NOT an example of matter?

• heat

• water

• smoke

• water vapor

• air

Which of the following properties can only be determined through a chemical change?

• hardness

• mass

• color

• explosiveness

• melting point

All of the following changes to a metal are physical changes EXCEPT:

• cutting

• rusting

• bending

• polishing

• melting

Consider the chemical reaction in which carbon (C) reacts with oxygen gas (O2) to produce carbon dioxide (CO2). What mass of carbon dioxide would be produced if 24 grams of carbon reacted completely with 64 grams of oxygen?

• 64 g

• 40. g

• 88 g

• 130 g