Question

calculate weight of 3.491 × 10^9 molecules of cl2

Answer 1

goof Afternoon friend...


suppose there are n molecules of Cl2.

therefore the number of moles of cl2 are

moles=n/(6.023x10^23)

therefore now the mass is equal to

mass=moles*71

thats your answer do the math

directly mass=n*71/(6.023x10^23)

I think you have got it bro