Balancing Chemical Equations Quiz

What is the first step in learning to balance chemical equations according to Mr. Cazy?

• Ignoring stoichiometry

• Finding magical solutions

• Studying and preparing for chemistry class

• Memorizing the periodic table

What does the conservation of mass imply in a chemical reaction?

• Mass can be created or destroyed

• Mass is irrelevant in chemical reactions

• Mass is only important in physical changes

• Mass of products must equal mass of reactants

When balancing chemical equations, what should you treat polyatomic ions as?

• Variable components

• Separate elements

• Unimportant

• A single unit

In the example of nitrogen and hydrogen forming ammonia, what is the lowest common multiple used to balance hydrogen?

• Two

• Three

• Four

• Six

What is the correct balanced equation for nitrogen and hydrogen forming ammonia?

• N2 + 3H2 → 2NH3

• N2 + H2 → NH3

• N2 + 2H2 → NH3

• 2N2 + 3H2 → 2NH3

In the decomposition of iron(III) hydroxide, what is the product along with iron(III) oxide?

• Carbon dioxide

• Hydrogen

• Oxygen

• Water

What is the coefficient of water in the balanced equation for the decomposition of iron(III) hydroxide?

• Two

• One

• Four

• Three

In the reaction between copper and silver nitrate, what is the balanced coefficient for silver?

• Two

• One

• Four

• Three

What is the balanced equation for the reaction between copper and silver nitrate?

• Cu + AgNO3 → Cu(NO3) + Ag

• 2Cu + AgNO3 → Cu(NO3)2 + 2Ag

• Cu + AgNO3 → Cu(NO3)2 + Ag

• Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

What should you do if you find the need to change a subscript while balancing an equation?

• Add more reactants

• Change it to balance the equation

• Rewrite the correct formula

• Ignore it