What is the ppm of 4.50mg of ddt in 10kg of seal fat?
I think I worked this problem for you about a week or so ago.
no that was a molarity problem
Here it is by FF but with you using so many screen names one never knows. As I said above, using the same screen name helps us help you and changing names helps no one.
http://www.jiskha.com/display.cgi?id=1417667658
To calculate the parts per million (ppm) of a substance in a mixture, you need to divide the mass of the substance by the total mass of the mixture, and then multiply by 1,000,000.
In this case, you have 4.50 mg of DDT and a total mass of 10 kg of seal fat.
First, convert the mass of DDT to grams:
4.50 mg = 4.50 × 10^-3 g
Next, convert the mass of seal fat to grams:
10 kg = 10,000 g
Now, calculate the ppm:
ppm = (mass of DDT / mass of seal fat) * 1,000,000
ppm = (4.50 × 10^-3 g / 10,000 g) * 1,000,000
ppm = (4.50 × 10^-7) * 1,000,000
ppm = 450
So the ppm of 4.50 mg of DDT in 10 kg of seal fat is 450 ppm.