Question

How many molecules are there?

Answer 1

an awful lot

Answer 2

I was thinking there are like... at least a billion. Maybe more.

Answer 3

well when we see i mole then 32gms of oxygen has 6.22 x 10^23 mollecules

Answer 4

much more than a billion - ah thank you ishaan94 - i had forgotten avogadro's number

Answer 5

i've just googled it - approximately 10^80 atoms in the observable universe!!

Answer 6

Arthur Eddington's writings on this topic are enjoyable reading and good food for thought. See, for instance, "The Expanding Universe". About 10^80.

Answer 7

impossible to tell, but Wolfram Alpha estimates that there are 10^80 atoms in the observable universe

Answer 8

1.6789^-34