Chem question, need answer quick please

Test Preparation
1

<p>hey, here's the question</p>

<p>Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is .4 micrograms Hg/mL, what is the total mass in kilograms of the mercury in the lake. (surface area= 100 square miles, depth =20ft)</p>

<p>Also, one could consider soda homogeneous right? or since u can visibly distinguish the CO2, would it be heterogeneous?</p>

<p>Thanks very much.</p>

2

<p>too much cauculations.basicly, you use the surface area times the height. and multiply that number with the .4 mg/ml. And u ll get the answer. but remember to convert the unit.hope this helps</p>

3

<p>It would be a heterogeneous mixture. You can see the interfaces between the carbon dioxide phase and the solution phase.</p>

4

<p>632,000 kg Hg</p>

<p>I would show the work but it is rather lengthy as it contains a number of conversions.</p>

<p>ft^2. --> ft. --> in. --> cm --> cm^2 --> cm^3 = mL</p>

<p>micrograms/mL --> kg/mL</p>

5

<p>thanks a lot</p>