How long would it take to count all the atoms in

[phartnett]

How long would it take to count all of the atoms in 12 grams of Carbon-12, If you could only count one atom per second?

 

[fluidistic]

Hint : How many grams of carbon 12 makes one mole? How many atoms is there in a mole?

 

[phartnett]

hey, thanks a lot for your reply, yeah i know about Avagadro’s number but i am stuck on getting it into years, dividing it by how many seconds in a year?

 

[negitron]

It's easy to calculate the number of seconds in a year if you know the number of seconds in a minute, the number of minutes in an hour, the number of hours in a day and the number of days in a year.