Workers in underwater caissons or diving suits necessarily breathe air at greater than normal pressures. If they are returned to the surface too rapidly, N2, dissolved in their blood at the previously higher pressure, comes out of solution and may cause emboli, bends, and decomposition sickness. Blood at 37 °C and 1 atm pressure dissolves 1.3 mL of N2 gas per 100 mL of blood. Compute the volume of N2 likely to be liberated from the blood of a caisson worker who is returned to 1 atm pressure after prolonged exposure to air pressure at a depth of 300 m of water. The total blood volume of the average adult is 4.8 L. Also note that air contains 78% N2 by volume.

Calculate the solubility of carbon dioxide in water at an atmospheric pressure of 0.480 atm (a typical value at high altitude). Atmospheric Gas Mole Fraction kH mol/(L*atm) N2 7.81 x 10-1 6.70 x 10-4 O2 2.10 x 10-1 1.30 x 10-3 Ar 9.34 x 10-3 1.40 x 10-3 CO2 3.33 х 10-4 3.50 x 10-2 CH4 2.00 x 10-6 1.40 x 10-3 H2 5.00 x 10-7 7.80 x 10-4 M

Calculate the solubility of nitrogen gas in solution if the pressure of the gas mixture above the liquid is 1.53 atm. The gas mixture is 68.3% nitrogen, 20.1% oxygen and 11.6% carbon dioxide. -4 (KH for nitrogen is 6.1 × 10*M/ atm) 6.4 x 10M -4 а. -4 b. 9.3 x 10*M с. 6.1 x 10M d. 1.4x 10M

aluminum hydroxide has a Ksp value of 2.0x10-32.  This indicates that aluminum hydroxide is miscible in water. that almost no aluminum hydroxide will dissolve in water. the amount of aluminum hydroxide that will dissolve in water cannot be determined from this value. that a significant amount of aluminum hydroxide will dissolve in water.

A 2333 g sample of ground water is found to contain 0.0503 g of arsenic. Calculate the concentration of arsenic in parts per million, ppm.

Fipronil (MM=437.14 g/mol) is a common insecticide used for a variety of crops including rice and maize. In 2017, eggs in Europe were found to have concentrations of fipronil above 1.14x10-8 M. What is this concentration in ppb? (include units in your answer)

-1 A certain liquid X has a normal freezing point of 5.90 °C and a freezing point depression constant K,=5.86 °C·kg•mol . Calculate the freezing point of a solution made of 20.1g of barium hydroxide (Ba(OH),) dissolved in 250. g of X. Round your answer to 3 significant digits. °C x10

Aluminum hydroxide has a Ksp value of 2.0x10-32.  This indicates that aluminum hydroxide is miscible in water. that almost no aluminum hydroxide will dissolve in water. the amount of aluminum hydroxide that will dissolve in water cannot be determined from this value. that a significant amount of aluminum hydroxide will dissolve in water.

Which of the following phenomena is best described by Henry’s Law?a. Increasing temperature favors an endothermic process.b. The solubility of NaCl(s) in water increases with increasing temperature.c. The solubility of MgCl2(s) in water is unaffected by pressure.d. The vapor pressure of an aqueous solution of glucose, C6H12O6, is lower than the vapor pressure of pure water.e. The solubility of O2(g) in water increases with increasing pressure.

A Vitamin C packet is added to a glass of water containing 700.0 mL of water. The Vitamin C packet contains 1000.0 mg of Vitamin C. What is the concentration of Vitamin C in ppm in the resultant solution? (density of water = 1.00 g/mL)