Question

number of moles of oxygen present in 0.3 moles of ozone . ???

Answer 1

Given, no. of moles of ozone = 0.3
Mass of the ozone = 0.3 × 48
= 14.4 g.

Now, Let us first calculate the total no. of atoms in 0.3 mole of ozone.

No. of atoms of O = 3 × 0.3 × 6.022 × 10^23
= 3 × 1.81 × 10^23 atoms.

Now, 3 × 1.81 × 10^23 atoms of oxygen are present in 0.3 moles of Ozone.

Using the formula,
No. Of atoms = No. of moles × Avogadro's number
Thus,
No. Of moles = 3 × 0.3 × 6.022 × 10^23/6.022 × 10^23
= 0.3 × 3
= 0.9

Hence, the number if moles of the oxygen in 0.3 moles of ozone is 0.9 moles.

Hope ut helps.

Answer 2

We know that 1 mole = 6.02 * 10^23.

We know that Ozone formula is O3, that means it contains 3 oxygen atoms.

So, 1 mole of ozone = 3 * 6.02 * 10^23.

                                  = 1.806 * 10^24 atoms.


Given 0.3 moles of ozone = 3 * 0.3 * 6.02 * 10^23

                                            = 5.41800* 10^23

We know that Number of moles = Number of atoms/6.02 * 10^23

= > 5.41800 * 10^23/6.02 * 10^23

= > 0.9.



Therefore, the number of moles present in 0.3 moles of ozone = 0.9.


Hope it helps!