Understanding Molecular Formulas and Atom Counting

What is the molecular formula for acetic acid?

• C2H4O2

• C2H5OH

• CH3COOH

• C3H6O

What happens if you change the subscripts in a molecular formula?

• The molecule becomes a gas.

• The molecule changes its chemical properties.

• The molecule remains the same.

• The molecule becomes unstable.

What does a coefficient in front of a chemical formula indicate?

• The type of chemical bond.

• The number of molecules present.

• The molecular weight.

• The number of atoms in a molecule.

How many carbon atoms are there in three molecules of acetic acid?

• 12

• 9

• 6

• 3

What is a polyatomic ion?

• An ion with a single charge.

• An ion with multiple atoms.

• An ion with only one atom.

• An ion that is neutral.

How many oxygen atoms are in three sulfate ions?

• 12

• 3

• 6

• 9

In the molecule aluminum sulfate, how many sulfur atoms are there in five molecules?

• 20

• 15

• 10

• 5

How many aluminum atoms are in five molecules of aluminum sulfate?

• 5

• 10

• 15

• 20

How many tin atoms are in four molecules of tin phosphate?

• 12

• 4

• 8

• 16

How many oxygen atoms are in four molecules of tin phosphate?

• 48

• 80

• 32

• 64