Question

How many atoms are in 1.50 moles of fluorine gas?

Answer 1

Answer: The number of atoms in given amount of fluorine gas are $1.807\times 10^{24}$

Explanation:

We are given:

Moles of fluorine gas $(F_2)$ = 1.50 moles

1 mole of fluorine gas contains 2 moles of fluorine atoms

According to mole concept:

1 mole of a substance contains $6.022\times 10^{23}$ number of particles

So, 1.50 moles of fluorine gas will contain $(2\times 1.5\times 6.022\times 10^{23})=1.807\times 10^{24}$ number of atoms.

Hence, the number of atoms in given amount of fluorine gas are $1.807\times 10^{24}$

Answer 2

Fluorine gas is a diatomic molecule (two bonded atoms).

So multiply the moles by two and then by Avogadro's number:

(2)(1.50 mol)(6.02x10^23 atoms/mol) = 1.81x10^24 atoms