How many oxygen atoms are there in 5 molecules of CH3FO

1 mole of a substance contains Avagadro's number of particles,

i. e. 6.023*10^23

By unitary method,

5 moles of oxygen contains 5 times the Avagadro's number of particles

i. e. 5 * (6.023*10^23) = 3.0115*10^24 number of particles.

Now, the further answer depends on what particles the question concentrates on.

If number of atoms are asked, the above answer must be multiplied by 2, because oxygen is a diatomic gas and each atom contributes to be a particle.

therefore, 5 moles of oxygen has 6.023*10^24 atoms.

If number of molecules asked, the above answer is directly written ...