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A: Answer is a) 0.114 ppm
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A: Given : Mass of calcium i.e solute = 40.5 mg And mass of pill i.e solvent = 3.50 g
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A: GIVEN: Mass of sample=50.0g Mass of mercury= 0.48 * 10-3g To Solve: mercury concentration of the…
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A: ppm can be converted to mg/m3 using the unit conversion method. 1 ppm = 1 mg/L
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A: Given,Percent of alcohol in mouth wash = 22.5% (VV).Volume of mouth wash in a bottle = 355mL.
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- When drinking water is disinfected with chlorine, an undesired byproduct, chloroform (CHCl3), may form. Suppose a 70-kg person drinks 2 L of water every day for 70 years with a chloroform concentration of 0.08 mg/L (the drinking water standard). Potency factor for chloroform = 6.1 x 10-3 (mg/kg-day)-1 The upper-bound cancer risk for this individual. a. 0.545 b. 5.45x10-6 c. 5.45x10-4 d. 5.45x10-10 e. 14x10-6 If a city with 300,000 people in it also drinks the same amount water described in the above question, how many extra cancers per year would be expected? Assume the standard 70-year lifetime. a. 0.163 b. 1.63x10-4 c. 1.63x10-3 d. 1.63x10-6 e. 6x10-2Oceanic uptake of carbon dioxide is thus described:CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/LHCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/LCharge balance equation:[H+] = [OH-] + [HCO3-] + 2[CO32 ] If the CO2 concentration in the atmosphere is 300 ppm, what is the pH of the ocean?After Maria’s 8th cup of coffee one night during finals week, she remembered that high doses of caffeine can kill you. Maria was worried that she was more susceptible because she weighed only 47.7 kg. Maria did some research and found that 150 mg/kg of caffeine was lethal and the coffee she was drinking is 0.04% m/v caffeine. How many cups of coffee could Maria drink before she would likely die?
- Oceanic uptake of carbon dioxide is thus described:CO2 (g) + H2O ⇔ H2CO3, K = [H2CO3]/PCO2 = 3 x 10-2 M atm-1 H2CO3 ⇔ HCO3- + H+, K = [HCO3-][H+]/[H2CO3] = 9 x 10-7 moles/LHCO3- ⇔ CO32 - + H+, K = [CO32 -][H+]/[HCO3-] = 7 x 10-10 moles/L CaCO3 ⇔ Ca2+ + CO32- Kc = 4 x 10-9 M2 What is the full charge balance equation for this system?A clinic had 25 patients on Friday morning. If 21 patientswere given flu shots, what percentage of the patientsreceived flu shots? Express your answer to the ones place.The recommended daily dose of calcium for an 18-year-old male is 1200 mg. If 1.0 cup of whole milk contains 290 mg of calcium and milk is his only source of calcium source, how much milk should an 18-year-old male drink each day in mL? Suppose the child is lactose intolerant, do some research and explain what type of milk would be a good substitute for the child. Please give mg of calcium per cup of alternative milk value, and show calculations for how much of the alternative milk an 18-year-old male should drink each day in mL. (Hint: 1 cup = 236.588 mL) Show all work. Give numerical answers in 2 significant figures.
- Table of caffeine standards concentration . Sample Conc, ppm Std1 16 Std2 32 Std3 48 Std4 64 Std5 80 If the volume used to make 100 mL of std 1 is 2 uL what is the concentration in M used to make std calibration curve ? The standards are going to be used to build calibration curve to analyze caffeine in an energy drink. if 500 mL of the energy drink has target of 400 mg , how will you prepare the sample if you need 10 mL for the analysis ? Caffeine MM=194.19 g/mol.Strontium phosphate, Sr3(PO4)2Sr3(PO4)2, dissociates when placed in water. This compound has a solubility of 0.112 mg/L in water at 20 °C. Calculate the Ksp of Sr3(PO4)2Sr3(PO4)2. Please write your answer using scientific notation according to the following format: 0.0010 would be writen as 1.0*10^-3.What is the solubility of HgI2 in water? The Ksp for HgI2 is 4.0X10^-29
- What is the CV of the data below? 2.7 ppm, 3.0 ppm, 2.6 ppm, 2.8 ppm, and 3.2 ppmAbdominal inject a small white rat (18g) with a dosage of 10mg/kg,drug concentration is 0.1%,How much should be injected(ml)?magnesium hydroxide, Mg(OH)2, found in milk of magnesia, has a solubility of 7.05x10-3 gL-1 at 25ºC. Calculate the Ksp for Mg(OH)2 with a tolerance of +8 (Please type answer)