ppm represent concentration of Pb in mg/L . Thus,
0.015 ppm = 0.015 mg/L = 0.015×10-3 g/L
Molar mass of Pb = 207.2 g/mol
Molarity = (0.015×10-3)/207.2 mol/L = 0.72×10-7 mol/L
Please give feedback!
The action level for lead (Pb) in water is 0.015 ppm. What is the concentration in...
What is the concentration of bromide, in ppm, if 169.32 g MgBr2 is dissolved in 1.47 L water. Record your answer in scientific notation to 3 significant figures.
A) Calculate the molality of a sucrose solution made by dissolving 73.1 grams sucrose into 55.3 grams water. The molar mass of sucrose is 342.2 g/mol. Record your answer in scientific notation using 3 significant figures. Use * for the multiplication symbol. B) A sodium hydroxide solution that contains 55.5 grams of NaOH per L of solution has a density of 1.14 g/mL. Calculate the molality of the NaOH in this solution. Record your answer to 2 decimal spaces. C)...
USE CORRECT SIG FIGS AND SCIENTIFIC NOTATION Determine the molar (M) concentration of a solution made by dissolving 7.714E1 g of CaCl2 in sufficient water to make 250.0 mL of solution. Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimale.g. 2.5E5 for 2.5 x 105) Numeric Answer: Determine the number of grams of potassium permanganate present in 5.25E1 mL of a 0.250 M KMnO4(aq) solution. 0 Respond with the...
What is the molarity when 47 g of KCl dissolved in enough water to give 375 ml of solution? Provide numeric answer (no letters or units) with correct number of sig figs. (for example: if your answer is 1.234 M, you must type it as 1.234E0.) Respond with the correct number of significant figures in scientific notation (Use Enotation and only 1 digit before decimale.g. 2.SES for 2.5 x 10" Numeric Answer
1. The octanol-water partition coefficient (Kow) for maleic acid (C4H4O4) is 0.32. Determine the equilibrium concentration (in mol/L) of maleic acid in octanol, if the equilibrium concentration of maleic acid in water is 4.53 x 10-2. Report your answer to three significant figures in scientific notation. b) The octanol-water partition coefficient (Kow) for 4-methylphenol (C7H8O) is 93.33. At equilibrium, the concentration of 4-methylphenol (C7H8O) was found to be 6.32 x 10-3 M in octanol. Determine the mass (in g) of...
The octanol-water partition coefficient (Kow) for trichloromethane (CHCl3) is 93.33. Determine the equilibrium concentration (in mol/L) of trichloromethane in octanol, if the equilibrium concentration of trichloromethane in water is 6.26 x 100. Report your answer to three significant figures in scientific notation. Submission not graded. Use fewer digits. Tries 1/3 Previous Tries (5.84x10^4mol/L) is wrong 2. The octanol-water partition coefficient (Kow) for 1,3,5-trichlorobenzene (C6H3Cl3) is 30902.95. At equilibrium, the concentration of 1,3,5-trichlorobenzene (C6H3Cl3) was found to be 4.29 x 10-1...
answer with two sig figs scientific notation QB 15.10 Level 1 Homework. Unanswered In an aqueous solution, if the [OH-] is 7.5E-9 M what is the [H30+)? 0 Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 105) Numeric Answer: Unanswered . 2 attempts left Submit In an aqueous solution, if the [H3O+] is 7.1E-9 M what is the [OH-]? Respond with the correct...
1-sample water has a trace amount of 50 ppm of FeCl find its concentration in molarity mol/l. 2- -sample water has a trace amount of 50 ppb of FeCl3 find its concentration in molarity mol/l.
1. The octanol-water partition coefficient (Kow) for 1,2-diphenylhydrazine (C12H12N2) is 21.88. Determine the equilibrium concentration (in mol/L) of 1,2-diphenylhydrazine in octanol, if the equilibrium concentration of 1,2-diphenylhydrazine in water is 6.23 x 10-3. Report your answer to three significant figures in scientific notation. Submit Answer Tries 0/13 2. The octanol-water partition coefficient (Kow) for trimethylamine (C3H9N) is 1.45. At equilibrium, the concentration of trimethylamine (C3H9N) was found to be 5.57 x 10-1 M in octanol. Determine the mass (in g)...
Prelaboratory Assignment 1. A solution is labeled 512 ppm. The solution is made with a solute that has molar mass equal to 338 g/mol. What is the molarity of the solution? 2. Using the graph on the previous page, answer the following two questions: Label your answer and give the correct number of significant figures. Write your answers in complete sentences, like you are reporting your results to a journal or at a scientific conference. What is the concentration (in...