Physical Science Chapter 7.3 and 7.4 Test

Balance the following chemical equation:

Fe₃O₄ + H₂ ----> Fe + H₂O

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Balance the following chemical equation:

H₃PO₄ ----> H₄P₂O₇ + H₂O

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Is this chemical equation balanced?

C₁₀H₁₆ + 8Cl₂ ---> 10C + 16HCl

• Balanced

• Unbalanced

Which conclusion is true about the graph shown here?

• Boiling changes a gas to liquid

• From freezing to boiling there is no temperature change.

• Melting changes a liquid to a gas.

• Boiling occur at a higher temperature than melting

Which is NOT true about the following image?

• The mass of solid A and the mass of liquid B combine to equal the mass of mixture C.

• It demonstrates the Law of Conservation of Mass

• A solute (solid A) dissolved in a solvent (liquid B) forming a solution (homogeneous mixture)

• There is a temperature change when solid A dissolved in liquid B.

Changing state of matter requires thermal energy.

• True

• False

A characteristic of matter that can still be observed as it changes to a different type of matter is called a ____________ ______________.

(a)  

Which is NOT evidence that a chemical change occurred?

• formation of bubbles

• increase in temperature

• decrease in temperature

• Change in shape

What property is present in ALL matter and contributes to chemical changes?

• reacting quickly with other matter

• how fast the temperature changes

• movement of particles

• particles which repel each other

What is going on in this chemical reaction?