How many moles of carbon are in 7.87x10^7 carbon molecules?

There are 6.022*10^23 molecules in 1 mole of carbon

So how many will moles will be 7.87*20^7?

Let the required number of moles be ‘x’.

1 mole - - - 6.022*10^23

x moles---7.87*10^7

(Cross multiplication)

x=7.87*10^7/6.022*10^23

Therefore x=1.3*10^-16

7.87x10^7 = 78700000