Balancing Chemical Equations Using Algebraic Method

What fundamental principle is acknowledged every time we write a balanced chemical equation?

• Law of Conservation of Charge

• Law of Conservation of Momentum

• Law of Conservation of Mass

• Law of Conservation of Energy

In the algebraic method, what do the variables x, y, and z represent in the equation xH2 + yO2 → zH2O?

• The number of atoms

• The coefficients of the molecules

• The subscripts of the molecules

• The number of molecules

What is the balanced equation for the reaction of hydrogen and oxygen to form water?

• 2H2 + O2 → 2H2O

• H2 + O2 → H2O

• 2H2 + 2O2 → 2H2O

• H2 + 2O2 → 2H2O

When balancing the equation N2 + H2 → NH3, what is the coefficient of H2 in the balanced equation?

• 1

• 2

• 3

• 4

What is the balanced equation for the reaction of nitrogen and hydrogen to form ammonia?

• N2 + H2 → NH3

• N2 + 2H2 → 2NH3

• N2 + 3H2 → 2NH3

• 2N2 + 3H2 → 2NH3

In the equation NH3 + O2 → NO + H2O, what is the balanced coefficient for O2?

• 6

• 5

• 3

• 4

In the reaction NH3 + O2 → NO + H2O, what is the coefficient of NH3 in the balanced equation?

• 1

• 2

• 4

• 3

What is the balanced equation for the decomposition of hydrogen peroxide?

• H2O2 → 2H2O + O2

• 2H2O2 → 2H2O + O2

• H2O2 → H2O + O2

• 2H2O2 → H2O + 2O2

In the combustion of glucose, what is the coefficient of O2 in the balanced equation?

• 7

• 6

• 5

• 8

What is the balanced equation for the combustion of glucose?

• C6H12O6 + 6O2 → 6CO2 + 5H2O

• C6H12O6 + 6O2 → 5CO2 + 6H2O

• C6H12O6 + 5O2 → 6CO2 + 6H2O

• C6H12O6 + 6O2 → 6CO2 + 6H2O