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Calculate the concentration of Br (MW = 79.904 g/mol), in milligrams per milliliter (mg/mL), in an...
A chemist prepares a solution by adding 348 mg of K2Cr2O7 (MW = 294.19 g/mol) to a volumetric flask, and then adding water until the total volume of the contents of the flask reaches the calibration line that indicates 750 mL . Determine the molarity of the prepared solution. Express the concentration in moles per liter to three significant figures. ► View Available Hint(s) Templates Symbols undo redo 'reset keyboard shortcuts help concentration = mol/L Submit Previous Answers Determine the...
A) A chemist prepares a solution by adding 304 mg of Co(NO3)2 (MW = 182.94 g/mol) to a volumetric flask, and then adding water until the total volume of the contents of the flask reaches the calibration line that indicates 100 mL. Determine the molarity of the prepared solution. B) Determine the mass of chloride (MW = 35.45 g/mol) in grams present in 100mL of a 0.289 M solution of aqueous FeCl3 (iron(III) chloride). C) A beaker contains 250 mL...
Calculate the concentration in mol/L, M, of an aqueous sugаr solution with a concentration of 22.5% (w/w) and density of 1.070 g/mL at 25°C. The molecular weight of sugar is 342.30 g/mol. Report your answer to three significant figures. М.
A 48.30 mL aliquot from a 0.460 L solution that contains 0.375 g of MnSO, (MW = 151.00 g/mol) required 39.9 mL of an EDTA solution to reach the end point in a titration. What mass, in milligrams, of CaCO, (MW = 100.09 g/mol) will react with 1.82 mL of the EDTA solution? mass: mg
A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL of water. Assume the solution has a density of 1.00 g/mL What is the concentration of Na* (MW = 22.9898 g/mol) in the solution in units of molarity (M)? concentration: М What is the concentration of Na+ in the solution in units of parts per thousand (ppt)? concentration: ppt A 50.0 mL aliquot of the solution is then diluted to a final volume of...
A solution contains 1.577 mg of CoSO4 (155.0 g/mol) per milliliter. Calculate a. the volume of 0.007840 M EDTA needed to titrate a 25.00-mL aliquot of this solution. Volume = mL b. the volume of 0.006901 M Zn2+ needed to titrate the excess reagent after addition of 50.00 mL of 0.007840 M EDTA to a 25.00-mL aliquot of this solution. Volume = mL c. the volume of 0.007840 M EDTA needed to titrate the Zn2+ displaced by Co2+ following addition...
Calculate the milligrams of chlorine ( 35.453 g/mol) in a 4.27 g solution of 20.2 wt% CaCl 2 ( 110.98 g/mol). mass: mg Cl
5.3307 g of Na2CrO4 (MW 161.97 g/mol) is dissolved in 1000.0 mL of water. Assuming the solution has a density of 1.00 g/mL, what is the concentration of Na (MW 22.9898 g/mol) in the solution in units of a) molarity (M)? Number b) parts per thousand (ppt)? Number ppt c) 25.0 mL of the solution is then diluted to a final volume of 500.0 mL. What is the concentration of Na* in the diluted solution in units of parts per...
A solution of F− is prepared by dissolving 0.0722±0.0005 g NaF (molar mass = 41.989±0.001 g/mol) in 154.00±0.06 mL of water. Calculate the concentration of F− in solution and its absolute uncertainty. Significant figures are graded for this problem. To avoid rounding errors, do not round your answers until the very end of your calculations.
A solution of F− is prepared by dissolving 0.0986±0.0004 g NaF (molar mass = 41.989±0.001 g/mol ) in 162.00±0.06 mL of water. Calculate the concentration of F− in solution and its absolute uncertainty. Significant figures are graded for this problem. To avoid rounding errors, do not round your answers until the very end of your calculations.