Intro to Chemical Reactions Lesson

Multiple Choice

A precipitate is a 

• liquid that forms when two solids are reacted
• a solid that forms when two liquids are mixed
• a gas that forms when vinegar and baking soda react
• a change of color in a solution

Multiple Choice

The dissolving of ice tea powder in water is

• not a chemical reaction
• partly a chemical reaction
• it has reactants and products
• None of the above

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, rearrenged
• None of the above

Multiple Choice

How many aluminum (Al) atoms are present in the compound Al₂(SO₄)₃?

• 2

• 3

• 4

• 6

Multiple Choice

How many sulfur (S) atoms are present in the compound Al₂(SO₄)₃?

• 2

• 3

• 4

• 6

Multiple Choice

How many oxygen (O) atoms are present in the compound Al₂(SO₄)₃?

• 4

• 6

• 8

• 12

Multiple Choice

What is the total number of atoms in one formula unit of Al₂(SO₄)₃?

• 12

• 17

• 18

• 20