Chemical Formulas and Atom Counting

The video tutorial explains how to count the number of atoms in sulfuric acid (H2SO4) by understanding subscripts and coefficients. Subscripts indicate the number of atoms of each element in a molecule, while coefficients apply to the entire molecule, affecting the total atom count. The tutorial demonstrates calculating atoms in H2SO4 and how coefficients double the atom count when balancing chemical equations.

What is the role of a subscript in a chemical formula?

• It denotes the phase of the substance.

• It indicates the number of molecules.

• It shows the number of atoms of the element.

• It represents the charge of the molecule.

How many hydrogen atoms are present in H2SO4?

• 4

• 2

• 1

• 3

What is the total number of atoms in a single molecule of H2SO4?

• 8

• 5

• 6

• 7

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

• The temperature at which the reaction occurs.

• The type of chemical reaction.

• The number of atoms in a molecule.

• The number of molecules involved.

How many sulfur atoms are present in 2 H2SO4?

• 2

• 4

• 3

• 1

Calculate the total number of oxygen atoms in 2 H2SO4.

• 4

• 6

• 8

• 10

What is the total number of atoms in 2 H2SO4?

• 16

• 10

• 12

• 14

What do subscripts in a chemical formula tell you?

• The number of molecules.

• The energy required for the reaction.

• The number of atoms of each element.

• The type of reaction.

In chemical equations, what do coefficients apply to?

• Individual atoms

• Only the last element

• Only the first element

• The entire molecule