Counting atoms

Front

What is the formula to determine the number of atoms in a compound?

Back

To determine the number of atoms in a compound, sum the coefficients and the subscripts of each element in the formula.

Front

How many atoms are in one molecule of water (H₂O)?

Back

There are 3 atoms in one molecule of water: 2 Hydrogen (H) and 1 Oxygen (O).

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in one molecule of the compound.

Front

How many total atoms are in the compound C₆H₁₂O₆?

Back

There are 24 total atoms in C₆H₁₂O₆ (6 Carbon + 12 Hydrogen + 6 Oxygen).

Front

In the compound NaCl, how many total atoms are present?

Back

There are 2 total atoms in NaCl (1 Sodium + 1 Chlorine).

Front

What is the significance of coefficients in a chemical formula?

Back

Coefficients indicate the number of molecules or moles of the compound.

Front

How many Oxygen atoms are in the compound Ca(OH)₂?

Back

There are 2 Oxygen atoms in Ca(OH)₂.

Front

How many total atoms are in the compound Fe₂(SO₄)₃?

Back

There are 14 total atoms in Fe₂(SO₄)₃ (2 Iron + 3 Sulfur + 12 Oxygen).

Front

What is the total number of atoms in the compound NH₄Cl?

Back

There are 5 total atoms in NH₄Cl (1 Nitrogen + 4 Hydrogen + 1 Chlorine).

Front

How many Aluminum atoms are in Al₂O₃?

Back

There are 2 Aluminum atoms in Al₂O₃.