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As a scuba diver descends under water, the pressure increases. At a total air pressure of 2.70 atm and a temperature of 25.0 *C , what is the solubility of N2 in a diver's blood? [Use the value of the Henry's law constant k calculated in Part A, 6.26*10^-4 mol/(l*atm).] Assume that the composition of the air in the tank is the same as on land and that all of the dissolved nitrogen remains in the blood.
ammonium nitrate is a common ingredient in chemical fertilizers. use the reaction shown to calculate the mass of solid
Caffeine (c8h10n8o2) is a stimulant found in coffee and tea . A solution of caffeine in chloroform (CHCl3) as a solvent has a concentration of 7.60×10-2.
a 100.-L flask contains a mixture of methane, CH4, and argon at 25°C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. calculate the total kinetic energy of the gaseous mixture.
What is the predicted number of 13C NMR peaks for methylcyclopentane and 1,2-Dimethylbenzene respectively
Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and 0.80 mole of sodium cyanate (NaCNO) in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 ? 10-4]
A sample of lead releases 221 kJ of heat when freezing. What is the mass of the sample? DHfus = 23 J/g
Based on a Kc value of 0.170 and the given data table, what are the equilibrium concentrations of XY, X, and Y, respectively
When aluminum reacts with concentrated hydrochloric acid, hydrogen gas evolves. The hydrogen is collected by displacement of water at 22ºC at a total pressure of 750 torr.
Calculate the vapor pressure of a solution made by dissolving 75.9 g of urea (molar mass= 60.06 g/mol) in 197.5 mL of water at 35C. (Hint: the vapor pressure of pure water at 35C is given
How many gm of dry NH4Cl need to be combined to 2.30L of a 0.300M solution of NH3, to prepare a buffer solution of pH 8.85.
Trans-1,4-di-tert-butylcyclohexane exists in a normal chair conformation. Cis-1,4-di-tertbutylcyclohexane, however, adopts a twist-boat conformation. Draw both isomers, and explain why the cis isomer is more stable in a twist-boat conformation.
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
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