Counting Atoms

How many atoms are there in the equation H2O?

• 2

• 3

• 4

• 1

What is the total number of atoms in the equation 2H2 + O2 → 2H2O?

• 6

• 8

• 4

• 2

In the equation CH4 + 2O2 → CO2 + 2H2O, how many atoms of carbon are there?

• 2

• 4

• 3

• 1

How many atoms of oxygen are there in the equation 4Fe + 3O2 → 2Fe2O3?

• 6

• 10

• 8

• 4

What is the total number of atoms in the equation 2NaCl + H2SO4 → 2HCl + Na2SO4?

• 12

• 9

• 7

• 10

In the equation 2C6H12O6 → 4C2H5OH + 4CO2, how many atoms of hydrogen are there?

• 12

• 8

• 24

• 16

How many atoms of nitrogen are there in the equation 2NH3 + 3O2 → 2NO + 3H2O?

• 2

• 8

• 6

• 4

What is the total number of atoms in the equation 2KClO3 → 2KCl + 3O2?

• 10

• 20

• 13

• 15

In the equation 2C2H6 + 7O2 → 4CO2 + 6H2O, how many atoms of carbon are there?

• 2

• 6

• 4

• 8

How many atoms of hydrogen are there in the equation 2H2 + O2 → 2H2O?

• 2

• 6

• 4

• 8