Chemical Equations and Counting Atoms Quiz

Your first name

Your last name

Your class period

• !st
• 3rd
• 4th
• 5th
• 6th

The table below shows the chemical formula for four substances. Which substances listed in the chart is made up of the most atoms?

• Carbonic acid
• Nitric acid
• Phosphoric acid
• Sulfuric acid

How many Oxygen atoms are present in the chemical formula below?

• 2
• 3
• 6
• 5

A balanced chemical equation is shown below. How many atoms of Oxygen are there on the REACTANTS side?

• 2
• 4
• 8
• 12

The table below shows the chemical formula for four substances. Which substances have the same number of Carbon atoms?

• Substances 1 and 2
• Substances 2,3, and 4
• Substances 2 and 3 only
• Substances 1 and 3

The chemical equation to synthesize the compound salt is shown below. Based on the Law of Conservation of Energy is this equation balanced?

• No the amount of Sodium atoms on each side is uneven
• No the amount of Chlorine atoms on each side is uneven
• Yes the amount of both Sodium and Chlorine atoms are the same on each side so it is balanced.
• None of the above

The formula for caffeine is shown below. Based on the formula we can determine that one molecule of caffeine contains which of the following?

• 1 Carbon atom, 8 Hydrogen atoms, 10 Nitrogen atoms, and 2 Oxygen atoms
• 8 Carbon atoms, 10 Hydrogen atoms, 2 Nitrogen atoms, and 4 Oxygen atoms
• 10 Carbon atoms, 8 Hydrogen atoms, 10 Nitrogen atoms and 4 Oxygen atoms
• 8 Carbon atoms, 10 Hydrogen atoms, 4 Nitrogen atoms and 2 Oxygen atoms

A student is trying to prove the Law of Conservation of Matter. They have the following chemical reaction. Identify whether or not the equation follows the Law of Conservation of Matter. Is it balanced or unbalanced?

• This equation is balanced
• This equation is not balanced
• Its not possible to balance this equation
• None of the above