A harmful chemical named TNF has been found to be in the regional environment in Reno. Environmental scientists at the University of Nevada, Reno measured the concentrations of TNF to be 50 µg/kg in fish, 0.8 µg/m³ in air, 6.0 µg/m³ in water, and 5.0 µg/mg in settled dust. Every day, a typical Nevadan (bodyweight of 80 kg) consumes 1.5 kg of fish, inhales 15 m³ of air, drinks 0.003 m³ of water, and ingests 50 mg of settled dust. Assume such a typical Nevadan is exposed to TNF every day for 15 years. The absorption efficiency is 80% for the oral and 70% for the respiratory routes. Please find the uptake dose rate (in µg/kg/d) of Chemical TNF by a typical Navadan through all exposure pathways for these 15 years. Please round your results to the nearest integer and enter the number alone, without the unit.

A harmful chemical named TNF has been found to be in the regional environment in Reno. Environmental scientists at the University of Nevada, Reno measured the concentrations of TNF to be 50 µg/kg in fish, 0.8 µg/m³ in air, 6.0 µg/m³ in water, and 5.0 µg/mg in settled dust. Every day, a typical Nevadan (bodyweight of 80 kg) consumes 1.5 kg of fish, inhales 15 m³ of air, drinks 0.003 m³ of water, and ingests 50 mg of settled dust. Assume such a typical Nevadan is exposed to TNF every day for 15 years. The absorption efficiency is 80% for the oral and 70% for the respiratory routes. Please find the uptake dose rate (in µg/kg/d) of Chemical TNF by a typical Navadan through all exposure pathways for these 15 years. Please round your results to the nearest integer and enter the number alone, without the unit.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Toxic Cr(VI) can be precipitated from an aqueous solution by bubbling SO2 through the solution. How much SO2 is required to treat 3.00 × 108 L of 4.50×10-2 mM Cr(VI)?
A pharmacist works with a 1.75 M solution of sodium bromide (NaBr) and water. The volume of the solution is 84.0 milliliters. If the pharmacist dilutes the solution to 1.00 M, what is the volume of the new solution?
A 335 −mL−mL can of soda pop contains 44 gg of sucrose (C12H22O11C12H22O11). Part A What is the molarity of the solution with respect to sucrose? Express your answer using two significant figures.
In a lab, there are two beakers with a colorless odorless liquid. One beaker contains 89% oxygen and 11% hydrogen by mass. The other beaker contains 94% oxygen and 6% hydrogen by mass. Which beaker will you drink from and why?
What is the concentration, in units of grams of dye per liter of solution (g/L), of the dilute dye solution that is produced as follows? Transfer 16.51 mL of the stock solution (6.12 g/L) to a 200.0 mL volumetric flask and dilute to the 200.0 mL line with deionized water. Your answer should be reported to the correct number of significant figures.
Which piece of equipment would you use to measure 7.10 mL of CuSO4 (aq)?
Four different solutions were prepared in the laboratory. One was prepared by dissolving 28 g of potassium permanganate in enough water to make 200 milliliters of solution. Another was prepared by diluting 100ml of 5.8 molar of potassium permanganate solution to 500 mL. The third solution was prepared by aliquoting 5 mL each from the first two solutions and diluting it with 50mL. The fourth solution was prepared by adding thirty-five grams of potassium permanganate with 50 mL sample of the first solution and diluting it to 100mL. For the final solution, 18 mL aliquot from the first solution, 12 ml aliquot from the second solution 41 mL aliquot from the third solution and 19 mL of the fourth solution were mixed. What is the molarity of the fourt solution? What is the concentration of the final solution?
A patient is given an IV drip at a rate of 110 mL per hour for a total of 6.2 hours. The IV has a calcium ion concentration of 5.94 mEq/L. How many grams of calcium ion were delivered to the patient through the IV?
A fluoridated water supply contains 3 mg/L of F-. What is the maximum amount of Ca 2+, expressed in grams per liter, that can exist in this water supply?
A 15000 L tailings pond at a mine site was analyzed for cadmium contamination. First, a 25.0 mL sample of water was removed from the pond. Then the solution was evaporated to dryness, and 56.1 mg of cadmium was recovered (the identity of the metal was confirmed through other methods). Assuming the water is homogeneously distributed throughout the pond, what is the concentration of cadmium in the tailings pond?