The “normal” lead content in human blood is about 0.40 part per million (i.e., 0.40 g of lead per million grams of blood). A value of 0.80 part per million (ppm) is considered to be dangerous. How many grams of lead are contained in 6.0 × 103g of blood (the amount in an average adult) if the lead content is 0.62 ppm?

The “normal” lead content in human blood is about 0.40 part per million (i.e., 0.40 g of lead per million grams of blood). A value of 0.80 part per million (ppm) is considered to be dangerous. How many grams of lead are contained in 6.0 × 103g of blood (the amount in an average adult) if the lead content is 0.62 ppm?

Chemistry In Focus

7th Edition

ISBN:9781337399692

Author:Tro, Nivaldo J.

Publisher:Tro, Nivaldo J.

Chapter12: The Liquids And Solids Around Us: Especially Water

Section: Chapter Questions

Problem 47E

See similar textbooks

Similar questions

What is the difference between (a) mass and density? (b) an extensive and an intensive property? (c) a solvent and a solution?
Beakers (a), (b), and (c) are representations of tiny sections (not to scale) of mixtures made from pure benzene and pure water. Select which beaker gives proper representation of the result when the two pure substances are mixed.
Potassium sulfate has a solubility of 15 g/ 100 g water at 40C. A solution is prepared by adding 39.0 g of potassium sulfate to 225 g of water, carefully heating the solution, and cooling it to 40C. A homogeneous solution is obtained. Is this solution saturated, unsaturated, or supersaturated? The beaker is shaken, and precipitation occurs. How many grams of potassium sulfate would you expect to crystallize out?
The concentration of PSA (prostate-specific antigen) in the blood is sometimes used as a screening test for possible prostate cancer in men. The value is normally reported as the number of nanograms of PSA per milliliter of blood. A PSA concentration of 1.7 ng/mL1.7 ng/mL is considered low. Express that value in terms of the units shown. PSA= g/L PSA= kg/m3 PSA= mg/L
9. The density of a solution of trisodium phosphate is 1.0896 g/cc, and it is 7.50 percent by mass. What volume of the solution (in milliliters) do you need to supply 23.0 g of trisodium phosphate?
Fluoridation is the process of adding fluorine compounds to the drinking water. Fluoridated water can help decrease tooth decay in the population. A concentration of 1 ppm of fluorine is typically required to provide adequate amounts. While daily water consumption per person is 151.0 gallons, most people only consume 7.6 of this water; the rest is used for cleaning or gardening. What percent of the sodium fluoride is “wasted”?
The "normal" concentration of lead in blood is 0.40 parts per million (meaning, for example, 0.40 g of lead for every one million g of blood). A value of 0.80 parts per million (ppm) is considered dangerous. What is the mass of lead in 1.7⋅1031.7⋅103 g of blood if the lead content is 0.420.42 ppm?
The volume of seawater on Earth is about 3.3 x 108 mi3. If seawater is 3.5% sodium chloride by mass and has a density of 1.03 g/mL, what is the approximate mass of sodium chloride, in tons, dissolved in the seawater on Earth (1 ton = 2000 lb)?
. A sample of an ethanol-water solution has a volume of 52.5 cm³ and a mass of 49.6 g. What is the percentage of ethanol (by mass) in the solution? (Assume that there is no change in volume when the pure compounds are mixed.) The density of ethanol is 0.789 g/cm³ and that of water is 0.998 g/cm³. Percentage of ethanol = b. Alcoholic beverages are rated in proof, which is a measure of the relative amount of ethanol in the beverage. Pure ethanol is exactly 200 proof, a solution that is 50% ethanol by volume is exactly 100 proof. What is the proof of the given ethanol-water solution? proof Submit Answer % [References] Try Another Version 10 item attempts remaining
The maximum level of lead allowed in drinking water is 15 μg/kg. What is this concentration in units of parts per million? Can you explain and break the problem down so I can understand how the answer is 1.5 x 10^-2.
High-density lipoprotein (HDL) cholesterol is the “good” cholesterol because adequate levels reduce the risk of heart disease and stroke. HDL levels between 40. and 59 mg/dL are typical for a healthy individual. What is this range of HDL cholesterol in units of mol/L?
The solubility of (NH4)2SO4 in water is 75.4 g of (NH4)2SO4 per 100 g of water. 62.2 g of (NH4)2SO4 are added to 79.0 g of water. How many grams of (NH4)2SO4 dissolved in the water (write your answer with three significant figures)? g. Is this solution saturated or unsaturated (write "saturated" or "unsaturated" without the quotes.)