Question

How many atoms are present in a 1.0 mole sample of potassium perchlorate (KClO3)?

Answer 1

Okay, a mole of potassium perchlorate contains 6.02x1023 formula units of potassium perchlorate, but you're asking about individual atoms. So, let's look at the formula: KClO3. That's 1 potassium, 1 chlorine, and 3 oxygens, for a total of 5 atoms per formula unit. Now, multiple 5 by Avogadro's number above, to get 30.1x1023, which simplifies to 3.01x1024 atoms.

Answer 2

Answer: The number of atoms in 1.0 moles of potassium perchlorate is
`3.011* 10^(24)`

Step-by-step explanation:

We are given:

Moles of potassium perchlorate = 1.0 moles

According to mole concept:

1 mole of a compound contains
`6.022* 10^(23)` number of molecules.

1 mole of
`KClO_3` contains 1 potassium atom, 1 chlorine atoms and 3 oxygen atoms.

Number of atoms in
`KClO_3` = 5

So, 1.0 moles of potassium perchlorate will contain =
`(1.0* 6.022* 10^(23))=3.011* 10^(24)` number of atoms.

Hence, the number of atoms in 1.0 moles of potassium perchlorate is
`3.011* 10^(24)`