Question

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

Answer 1

1.3 x 10^-16

Step-by-step explanation:

I know the answer is correct because I got the exact same question during my lesson.

Answer 2

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

Lets say that the required number of moles will be x

1 mole —6.022*10^23

x moles—7.87*10^7

Cross multiply

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

Answer x=1.3*10^-16