Calculating Human Lifespan with Avagadro's Number: A Quick Chemistry Question

[extraordinarygirl]

A typical adult human heart beats an average of 60 times per minute. If you were allotted a mole of heartbeats, how long in years could you expect to live? You may assume each year has 365 days.

I know that I need to use the Avagadro's number ... 6.02 x 10^23, but I am not sure how to formulate a proportion to solve for it. I do know the answer, which is 1.9 x 10^16 years. If anyone could just help me understand how to solve for the answer you would be a great help! :!)

 

[mrjeffy321]

To do this, you need to convert heat beats per minute, into heat beat per year.
You know that there are 60 minutes in an hour, 24 hours in a day, and (for the purposes of this problem), 365 days in a year.

You are looking for the number of years it would take someone to accumlate 1 mol of heat beats (6.022 E23) at athe rate you just found earlier.

 

[extraordinarygirl]

Alright, so that would be 31536000 heart beats per year.
And then I would just put it into a proportion.
1 mol - 6.02 x 10 ^23
x - 31536000

and cross multiply!
Thanks, I guess that was an easier question than I was making it out to be!