Balancing Equations Practice Challenge

What is the correct coefficient for CaCl2 to balance calcium atoms in the reaction with Na3PO4?

• 1

• 4

• 2

• 3

How many phosphate ions are on the right side of the equation after balancing Ca3(PO4)2?

• 4

• 3

• 2

• 1

What coefficient is needed in front of NaCl to balance the sodium and chlorine atoms?

• 6

• 5

• 4

• 3

In the combustion of ethanol, what is the correct coefficient for CO2 to balance carbon atoms?

• 3

• 4

• 2

• 1

What is the correct coefficient for H2O to balance hydrogen atoms in the combustion of ethanol?

• 4

• 3

• 5

• 2

To balance the oxygen atoms in the combustion of ethanol, what coefficient is needed for O2?

• 4

• 5

• 3

• 2

In the synthesis reaction to produce octane, what is the correct coefficient for CO to balance carbon atoms?

• 9

• 8

• 2

• 1

What coefficient is needed for H2 to balance hydrogen atoms in the synthesis reaction producing octane?

• 20

• 17

• 18

• 19

In the decomposition of ammonium nitrate, what is the correct coefficient for H2O to initially balance hydrogen?

• 1

• 2

• 3

• 4

To finally balance nitrogen in the decomposition of ammonium nitrate, what coefficient is needed for N2?

• 3

• 1

• 4

• 2