An instrument used to detect metals in drinking water can detect as little as 1 ug of mercury in 1 L of water. Mercury is a toxic metal; it accumulates in the body and is responsible for the deterioration of brain cells. Calculate the number of mercury atoms you would consume if you drank 1 L of water that contained 1 ug of mercury. (The mass of one mercury atom is 3.3×10-22 g.3.3×10-22 g.) lu9

An instrument used to detect metals in drinking water can detect as little as 1 ug of mercury in 1 L of water. Mercury is a toxic metal; it accumulates in the body and is responsible for the deterioration of brain cells. Calculate the number of mercury atoms you would consume if you drank 1 L of water that contained 1 ug of mercury. (The mass of one mercury atom is 3.3×10-22 g.3.3×10-22 g.) lu9

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter2: Measurements And Calculations

Section: Chapter Questions

Problem 108AP: On the planet Xgnu, the natives have 14 fingers. On the official Xgnuese temperature scale (CX), the...

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Magnesium chloride is an important coagulant used in the preparation of tofu from soy milk. Its solubility in water at 20C is 54.6 g/100 g. At 80C, its solubility is 66.1 g/100 g. A mixture is made up of 16.2 g of magnesium chloride and 38.2 g of water at 20C. (a) Is the mixture homogeneous? If it is, how many more grams of magnesium chloride are required to make a saturated solution? If the mixture is not homogeneous, how many grams of magnesium chloride are undissolved? (b) How many more grams of magnesium chloride are needed to make a saturated solution at 80C?
On the planet Xgnu, the natives have 14 fingers. On the official Xgnuese temperature scale (CX), the boiling point of water (under an atmospheric pressure similar to earth’s) is 140 °X, whereas water freezes at 14 CX. Derive the relationship between °X and °C.
Be sure to answer all parts. Fluoridation is the process of adding fluorine compounds to drinking water to help fight tooth decay. A concentration of 1 ppm of fluorine is sufficient for the purpose (1 ppm means one part per million, or 1 g of fluorine per 1 million g of water). The compound normally chosen for fluoridation is sodium fluoride, which is also added to some toothpastes. Calculate the quantity of sodium fluoride in kilograms needed per year for a city of 50,000 people if the daily consumption of water per person is 105.0 gallons. (Sodium fluoride is 45.0 percent fluorine by mass. 1gallon =3.785 L; 1 ton = 2000 lb; 1 lb = 453.6 g; density of water = 1.0 g/mL) Enter your answer in scientific notation.
Assume household vinegar contains 5% acetic acid by weight and that the density of vinegar is the same as the density of water (1.00 g/mL). How many moles of acetic acid are present in 404 mL of household vinegar?
14K yellow gold is an alloy that contains gold, copper and silver. A 14K gold ring contains 6.90g of gold, 3.42g of copper and 1.48g of silver. What is the percentage (by mass) of gold in 14K gold?.
Fluoride ion is poisonous in relatively low amounts: 0.2 g of F-per 70 kg of body weight can cause death. Nevertheless, in order to prevent tooth decay, F- ions are added to drinking water at a concentration of 1 mg of F- ion per L of water. How many liters of fluoridated drinking water would a 70-kg person have to consume in one day to reach this toxic level? How many kilograms of sodium fluoride would be needed to treat a 8.50x107-gal reservoir?
Fluoride ion is poisonous in relatively low amounts: 0.2 g of F- per 70 kg of body weight can cause death. Nevertheless, in order to prevent tooth decay, F- ions are added to drinking water at a concentration of 1 mg of F- ion per L of water. How many liters of fluoridated drinking water would a 70-kg person have to consume in one day to reach this toxic level? How many kilograms of sodium fluoride would be needed to treat a 8.50×107-gal reservoir?
Convert (7.8x10^24) molecules of sodium chloride, NaCl (OR N a C l) to grams of sodium chloride. Avogadro's Number is (6.02x10^23). You must enter your answer in scientific notation. For example, 25 would be expressed as 2.5x10^1. Note: Your answer is assumed to be reduced to the highest power possible.
A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g /mL. Calculate the % by weight of CaCl2 in the solution described above. Group of answer choices .0594 .0632 6.32 5.94
What percent (%) of 5.0 x 10-3 is 6.4 x 10-5?
A solution is labeled "(1.810x10^1) % sucrose by mass". If an experiment requires (7.79x10^1) g of sucrose, how many grams of this solution would be needed?
You want to produce a 50 g sample of glucose by evaporating to dryness a quantity of glucose solution containing 8% glucose by mass. The density of the glucose solution is 1.15 g/mL. What volume of glucose solution, in liters, must be taken for this purpose?