Counting Atoms 1

Front

How many O's are in Al₂(SO₄)₃?

Back

12

Front

Number of N in (NH₄)₂CrO₄?

Back

2

Front

How many Sodium (Na) are in 6NaCl?

Back

6

Front

What is a subscript in a chemical formula?

Back

A small number below an element symbol that tells the number of atoms of that element.

Front

What does the formula Al₂(SO₄)₃ represent?

Back

Aluminum sulfate, which contains aluminum, sulfur, and oxygen.

Front

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

Back

14 (2 Al, 3 S, 12 O).

Front

What is the significance of parentheses in chemical formulas?

Back

Parentheses indicate that the enclosed group of atoms is a polyatomic ion and the subscript outside applies to the entire group.

Front

How do you determine the number of atoms of an element in a compound?

Back

Count the number of times the element appears in the formula, multiplied by any subscripts.

Front

What is the formula for calculating the total number of atoms in a compound?

Back

Add the number of atoms of each element, considering their subscripts.

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.