Chemical Equations

What does the number ₃ represent in 4NH₃?

• a. Subscript

• b. Superscript

• c. Coefficient

• d. numerical value

What does the number 4 represent in 4NH₃?

• a. Subscript

• b. Superscript

• c. Coefficient

• d. numerical value

How many Nitrogen (N) atoms are in 4NH₃?

• a. 1

• b. 2

• c. 3

• d. 4

 

How many Hydrogen (H) atoms are in 4NH₃?

• a. 10

• b. 12

• c. 14

• d. 16

How many total atoms make up 4NH₃?

• a. 3

• b. 4

• c. 14

• d. 16

In the equation shown, How many are the reactant(s)?

• a. 1

• b. 2

• c. 3

• d. 0

To balance an equation you should:

• ONLY change subscripts.

• b. ONLY change coefficients.

• c. Change BOTH subscripts and coefficients.

• d. none of these

Which reactant is missing from the equation shown?

(What should go in the place of the "X"?)

• a. One hydrogen atom.

• b. Three hydrogen atoms.

• c. Four oxygen atoms.

• d. two hydrogen

Which of the following is a chemical reaction?

• a. Sodium and chlorine atoms bond to form salt molecules.

• b. Ice melts to form water.

• c. Carbon dioxide freezes to form dry ice.

• d. Salt and water mix to form salt water.

The first part of a balanced chemical equation is shown:  H₂SO₄ + 2NaOH → ________.  In order for this equation to be balanced, how many hydrogen (H) atoms must be present in the products?

• a. 2

• b. 3

• c. 4

• d. 5