Balancing Chemical Equations Challenge

What is placed on the left side of a chemical equation?

• Products

• Reactants

• Coefficients

• Subscripts

What cannot be changed when balancing chemical equations?

• Products

• Reactants

• Subscripts

• Coefficients

Who first realized the law of conservation of mass?

• Isaac Newton

• Antoine Lavoisier

• John Dalton

• Albert Einstein

What does a coefficient in a chemical equation represent?

• Type of reaction

• Temperature

• Number of molecules

• Speed of reaction

In the reaction Zn + 2HCl -> ZnCl2 + H2, what is the coefficient of HCl?

• 1

• 2

• 3

• 4

What is the purpose of an element inventory in balancing equations?

• To check conservation of mass

• To list all elements used

• To identify reactive substances

• To determine temperature

How are polyatomic ions treated in balancing equations?

• Balanced as individual atoms

• Not included

• Balanced as single units

• Ignored

What is the correct representation for oxygen in its elemental state in chemical equations?

• O2

• O-

• O3

• O

Which of the following is a diatomic molecule?

• Phosphorus

• Chlorine

• Sulfur

• Carbon

What must be true for a chemical equation to be considered balanced?

• It must occur at room temperature

• It must conserve mass

• It must only have solid products

• It must contain water