The level of mercury in a stream was suspected to be above the minimum considered safe (1 part perbillion by weight). An analysis indicated that the concentration was 0.68 parts per billion. Assume adensity of 1.0 g/mL and calculate the molarity of mercury in the stream. (ppb calculation, then g → mol, then Molarity)

< 11 of 19 I Review Constants | Periodic Table Part B A student placed 16.0 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 45.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution? Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) ? Value Units

11. If 56.1 grams of NaCl are dissolved in 44.0 mL of Sulfuric acid, H2SO4 Sulfuric acid has a density of 1.84 grams per mL.  Calculate the following concentration measures. a. Weight/volume percent  b. Weight/weight percent  c. Molarity

2.000 g TUMS tablet (CaCO3 and Binder) was analyzed in a lab. 11.42 mL of 0.871 M HCI was needed to dissolve the CaCO3 (active ingredient) of TUMS Tablet. Find the mass and % by mass of CaCO3 in TUMS Tablets. ( 459.00 mg O 75% 50% 605.00 mg 30% O 25% O 400.00 mg O 500,00 mg