(10)1. Find the concentration in (a) mg/L, (b) ppm, (c) ppb, and (d) moles/L (M), respectively,...
How would you express the concentration level of drinking water 0.002 mg/L in ppm and ppb?
A solution contains 20 ppm Ca+2. Express the Ca+2 concentration in the following terms: 21. A solution contains 20 ppm Cat2. Express the Ca+2 concentration in the following terms: a. g Cat2 in 1,000,000 mL water (mL = 0.001 L) b. g Cat2 in 100 mL water c. % Cat2 in the 100 mL water d. mg Ca 2/kg water (mg = 0.001 g = 0.000001 kg) e. molarity (M or moles Cat2/L).
1. The LD50 of cocaine is 95.1 mg/kg. Calculate the concentration of a solution, in molarity if they drank 1 liter of it. 100 g / 303.346 g/mol = 0.329 mol of cocaine. 0.329 mol/ 1 L= 0.329 M for molarity. Is this correct? 2. Find one other concentration unit [mass/mass (g/g) or mass/volume (g/ml) percentage, ppm or ppb] that would be toxic to a 85 kg person. Assume the density of a solution of your substance is the same...
what is the mass concentration in mg/L and ppm of a solution containing 1 g of solids in 10 L of methanol? methanol= 0.792 g/mL
1. Calculate M, m, mole fraction, mass %, ppb (mass/vol) for the following solution: 0.550 mg Fe in 1.4 L pure water (d = 1.0 g/mL) @ 4°C. Assume no volume change from the addition of Fe. 2. If an experiment involving this solution is carried out by changing its temperature and recalculating iron concentration, which concentration units above would you prefer, and which would you avoid and why?
1.) What is the concentration in M of 2 moles of HCl in 6 L of solution? Round your answer to one decimal place. What is the concentration in M of a solution of 9.6 g of LiF made up to 500 mL in solution? Round your answer to 2 decimal places. A stock solution of 1.00 M NaCl is available. How many milliliters are needed to make 117.7 mL of 0.393 M solution? Round to the nearest whole number.
A solution at 25°C has a concentration of the permanganate ion, MnO4- (aq) = 2.38 mg/L. The solution has a density = 1 kg/L. What is the concentration of MnO4- (aq) in units of µg/L? What is the concentration of MnO4- (aq) in units of g/L? What is the concentration of MnO4- (aq) in units of moles/L? What is the concentration of MnO4- (aq) in units of millimoles/L? What is the concentration of MnO4- (aq) in units of micromoles/L? What...
12. Molarity, M, is defined as A. moles of solute dissolved in 1 mol of solvent. B. moles of solute dissolved in 1 kg of solvent. C. moles of solute dissolved in 1 L of solvent. D. moles of solute dissolved in 1 L of solution. E. moles of solute dissolved in the solution. 13. What volume of 2.50 M NaOH (40.00 g/mol) contains 0.100 mole of NaOH? A. 0.250 L D. 0.250 mL B. 40.0 mL E. 0.0400 mL...
10) 0.0085 g of N3⁻ is dissolved in 1.3 L of water. Determine the concentration of N3⁻ ions in ppm if the density of the solution is 1.00 g/mL. Show work A) 3.6 ppm B) 9.6 ppm C) 6.5 ppm D) 2.4 ppm E) 7.2 ppm
How to prepare these dilutions? 1. With access to 100 ppm riboflavin solution (50 mg riboflavin and 2.5 mL glacial acetic acid in 500 mL of distilled water), Prepare 25.00 mL of the riboflavin solution at 20 ppm in the 1:1 mixture of distilled water : 10% phosphate buffer. (The previous step was to make a 1:1 mixture of distilled water : 10% phosphate buffer of 30 mL) 2. Prepare 25.00 mL of a 100 ppb stock solution from the...