Question

In 1993 the Minnesota Department of Health set a health risk limit for cadmium in groundwater of 4.00 μg. Suppose an analytical chemist receives a sample of groundwater with a measured volume of 76.0 mL. Calculate the maximum mass n micrograms cadmium which the chemist could measure in this sample and still certify that the groundwater from which it standards came met Minnesota Department of Health Be sure your answer has the correct number of significant digits.

Answer 1

Maximum allowable mass of cadmium in a 76.0mL sample is 0.304μg (0.304mcg)

Step-by-step explanation:

In the complete question, the limit for cadmium is defined as 4.00μg/L.

μg can also be denoted as mcg

The concentration of cadmium is the amount of mass of cadmium per unit volume of water. The limit for the mass of cadmium in the measured sample can be found by multiplying the volume of water by the allowed concentration.

`concentration=(mass)/(volume)`

`mass=concentration*volume`

`mass=4.00mcg/L*0.076L`

`mass=0.304mcg`