Counting Atoms in a Chemical Formula

What information does a chemical formula provide?

• The color and state of matter of a substance.

• The elements involved and the number of atoms of each element.

• The temperature and pressure at which a reaction occurs.

• The density and volume of a compound.

How do subscripts and coefficients differ in a chemical formula like 2H₂O?

• Subscripts apply to the entire compound, while coefficients apply only to the atom they are behind.

• Subscripts indicate the number of molecules, while coefficients indicate the number of atoms.

• Subscripts apply only to the atom they are behind, while coefficients apply to the entire compound.

• Subscripts are multiplied by coefficients, but coefficients are not affected by subscripts.

In a chemical formula like Ba(OH)₂, what does the subscript '2' outside the parentheses indicate?

• There are 2 Barium atoms.

• There are 2 Oxygen atoms and 2 Hydrogen atoms.

• There are 2 Oxygen atoms only.

• There are 2 Hydrogen atoms only.

How many total atoms are present in one molecule of H₂O?

• 1

• 2

• 3

• 4

How many hydrogen atoms are in 3H₂O?

• 2

• 3

• 5

• 6