3. You use the external standard technique to get the following function for a linear regression, y = (0.5423 AU/(ug/mL))*x + 0.0354 AU. The unknown you measure has an absorbance of 0.237 AU. What is the concentration of the unknown sample?

If I add 646.84 g of magnesium chloride to 1,727.72 grams of hexane, what will the resulting boiling point of the new solution be? The boiling point of hexane is 68 ⁰C and Kb(C6H14) = 2.90 ⁰C/m. Don't round until the end and use two digits after the decimal

Calculate the volume in milliliters of a 1.40 mol/L barium acetate solution that contains 125. g of barium acetate significant digits. mL x10 X Ś (Ba(C₂H₂O₂)₂). Round your answer to 3

73 g of Na2SO4 in 280 mL of Na2SO4 solution Give your answer to two significant figures.

Calculate the volume in milliliters of a 1.68 mol/L sodium thiosulfate solution that contains 275. mmol of sodium thiosulfate (Na₂S₂O3). Be sure your answer has the correct number of significant digits. 0mL 0 x10 X

A chemist prepares a solution of silver(II) oxide AgO by measuring out 0.00677μmol of silver(II) oxide into a 300.mLvolumetric flask and filling the flask to the mark with water. Calculate the concentration in /μmolL of the chemist's silver(II) oxide solution. Round your answer to 3 significant digits.

A 7.00% (m/m) saltwater solution has a density of 1.171 g/mL. How many grams of salt are in 28.00 mL of the saltwater solution?

Alcoholic beverages come in many different concentrations denoted by their weight percent (w/w). If a beer is marked as 4.5%, it means there are 4.5 grams of ethanol (C2H6O) in every 100.00 grams of solution. Assuming this solution has a density of 1.00 g/mL, what is the molar concentration of this solution? Give your answer in in decimal format. When entering units, use proper abbreviated units with proper capitalization.

3. What units are used for dissolved oxygen in this experiment? What do they mean? The units are ppm (parts per million); meaning, the number of milligrams of molecular oxygen in every million milliliters of solution. The units are mg/ml; meaning, the number of milligrams of molecular oxygen in every million milliliters of solution. The units are mg/L; meaning, the number of milligrams of molecular oxygen in every liter of solution. The units are mg/L; meaning, the number of milligrams of water in every liter of molecular oxygen.

5.300. mL of a 18.0 M solution of H2SO4 acid has enought water added to it to make a new volume of 1.00 L. What is the new concentration? Numerical answer:    Unit:    Label:      Blank 1: Blank 2: Blank 3:   6.What is the concentration, in ppm, if 0.00021 g of Arsenic (As) was found in 3126 g of drinking water? Numerical answer:    Unit:    Label:      Blank 1: Blank 2: Blank 3: