Counting atoms

Front

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

Back

To find the total number of atoms in a compound, sum the products of the coefficients and subscripts for each element in the formula.

Front

How many total atoms are in the compound Al₂(SO₄)₃?

Back

There are 14 total atoms: 2 Aluminum (Al), 3 Sulfur (S), and 12 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

In the compound MgCl₂, how many Chlorine (Cl) atoms are present?

Back

There are 2 Chlorine (Cl) atoms in MgCl₂.

Front

How many atoms of Oxygen are in the compound Al₂O₃?

Back

There are 3 Oxygen (O) atoms in Al₂O₃.

Front

What is the significance of coefficients in a chemical formula?

Back

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

Front

How many Sodium (Na) atoms are in the compound 6NaCl?

Back

There are 6 Sodium (Na) atoms in 6NaCl.

Front

If a compound has the formula C₆H₁₂O₆, how many total atoms are there?

Back

There are 24 total atoms: 6 Carbon (C), 12 Hydrogen (H), and 6 Oxygen (O).

Front

What is the total number of atoms in 10MgCl₂?

Back

There are 30 total atoms: 10 Magnesium (Mg) and 20 Chlorine (Cl).

Front

How do you calculate the number of Oxygen atoms in a compound like Al₂(SO₄)₃?

Back

Multiply the number of sulfate groups (3) by the number of Oxygen atoms in each sulfate (4), resulting in 12 Oxygen atoms.