Posted by **manny** on Tuesday, September 4, 2007 at 4:05pm.

Hi,

I need help with this problem--- I have no idea how to go about it

_______________________________________________________________

An average adult breathes about 8.5 x 10^3 L of air per day. The concentration of lead in higly polluted urban air is 7.0 x 10^-6 g of lead per one m3 of air. Assume that 75% of the lead is present as particles less than 1.0 x 10^-6 m in diameter, and that 50% of the particles below that size are retained in the lungs. Calculate the mass of lead absorbed in this manner in one year by an average adult living in this environment.

***Note answer has two sigfigs

__________________________________________________

Thanks for all the help you guys can provide,

manny

- chem -
**DrBob222**, Tuesday, September 4, 2007 at 5:04pm
How about this hint.

(7.0 x 10^6 g/m^{3}) x 0.75 x 1/2 = amount of consumable lead. Convert 8.5 x 10^{3} L to cubic meters (or the other way around--it doesn't matter which one you convert) and calculate the amount consumed per day. Then multiply by 365 to convert to amount per year.

- chem -
**manny**, Tuesday, September 4, 2007 at 5:55pm
ok! thanks... Dr. Bob your the best!!!

I assumed you meant (7.0 x 10^-6 g/m3)

I got 8.1 x 10^-3 g Pb / year

_____________________________________________________________________________________________________________________

## Answer this Question

## Related Questions

- math - During one year, about 13 million adults over 18 years old in the U.S. ...
- Math - During one year, about 13 million adults over 18 years old in the U.S. ...
- Math - Suppose that humans walk about 10,000 steps per day on average. Your ...
- Math - Please explain in detail how to solve this: During one year, about 163 ...
- math - Suppose that humans walk about 10,000 steps perday on average. Your ...
- math - Suppose that humans walk about 10,000 steps per day, on awerage. 1. Your ...
- AP Bio potato/osmosis lab - If a potato core is allowed to dehydrate by sitting ...
- MTH/208 - East Battle Lake in Minnesota covers an area of about 1950 acres or 8....
- math - A full grown oak tree loses an average of about 7 tons of water through ...
- sculpture - I have Art III Ceramics. I need a concentration piece to make at ...

More Related Questions