Question

How many oxygen atoms are represented by the formula Fe(CIO4)3? iron(III) chlorate

3
16
12
4

Answer 1

12

Step-by-step explanation:

the 4 by the element symbol O multiplied by the 3 on the outside of the parentheses

Answer 2

`\boxed {\boxed {\sf C. \ 12 \ oxygen \ atoms }}`

Step-by-step explanation:

We are given the chemical formula:

`Fe(ClO_4)_3`

There are 3 elements here:

• Fe: Iron
• Cl: Chlorine
• O: Oxygen

The question asks for the number of oxygen atoms, so we can just focus on the O in the formula.

The O has a subscript of 4, indicating there are 4 oxygen atoms in the compound. But the compound is also enclosed in parentheses with a subscript of 3. Therefore, there are 3 of the compounds with 4 oxygen atoms.

We can multiply 3 and 4.

• 3*4= 12

There are 12 oxygen atoms.