Pre-assessment Chemical equations

The products of a reaction have the same ________as the reactants.

• molecule

• atoms

• subscripts

• coefficients

How many molecules of Carbon are in the following formula? 3C₂H₆

• 3
• 6
• 12
• 18

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Which one is a compound?

• Co
• Br
• Fe
• CO

Which one is an element?

• Co
• CO
• CO₂
• CO₃^-2

Which is the Law of Conservation of Matter?

• matter cannot be created or destroyed, it only rearranges

• matter can be created but it cannot be destroyed, it never rearranges

• matter can be destroyed but it cannot be created, it usually just rearranges

• matter is an unproven theory created by Hans Geiger

Chemical reactions occur when _________ are broken and new bonds are formed.

• mixtures
• osteoclasts
• physical bonds
• chemical bonds

The products of a reaction have the same ________as the reactants.

• molecule

• atoms

• subscripts

• coefficients

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation