Question

Question #d3d97

Answer 1

`("Number of carbon atoms")/"mm" = (7 xx 10^6" C")/"mm"`

Explanation:

If 1 carbon atom diameter = 150 picometers, then the problem is a conversion into number of carbon atoms per millimeter ...

`("1 carbon atom")/(150cancel"pm") xx (10^12cancel"pm")/cancel("m") xx (10^(-3)cancel"m")/"mm"`

`= (7xx10^6 " carbon atoms")/("mm")`

So, 1 mm diameter graphite dot = `7xx10^6` carbon atom diameter