How long does it take a person at rest to breathe
How long does it take a person at rest to breathe one mole of air if the person breathes 78.0 mL/s of air that is measured at 25 degrees Celcius and 755 mmHg?
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To determine the solubility product constant (Ksp) at 50oC forNi(IO3)2, a chemist prepares a saturated solution of the salt at this temperature.
Eighty-six proof whiskey is 43 percent ethylalcohol, CH3CH2OH, by volume.If the density of ethyl alcohol is 0.79 kg/L, what is its molarity in whiskey?
Calculate the pH of a solution prepared by mixing 15.0mL of 10M NaOH and 30.0mL of 10.0M benzoic acid solution.(Benzoic acid is monoprotic; its dissociation constant is 6.5*10^-5)
A volume of 6.55 mL of the NaOH solution was required to reach the endpoint. What is the concentration of the unknown H3PO4 solution?
127.7g of NaCll completely dissolves (producing Na+ and Cl- ions) in 1.00kg of water at 2.0 degree celcius. the vapor pressure of pure water at this emperature is 23.8 torr. Determine the vapor pressure of the solution.
1 mole of an ideal monatomic gas at STP experiences a reversible process in which volume is doubled. The nature of the process is unspecified but q = 1662.8 J. deltaH = 2078.5 J.
Phenol is a common organic compound that may be used as a disinfectant. Its pKa in water is 10.0 while in methanol its pKa = 14.4. Is it a stronger acid in water or methanol? Explain the difference in the pKa for phenol in the different solvents.
How many grams of dipotassium oxalate (M.W.=166.22) should be addedto 20.671 mL of 0.7097 M HClO4 to provide a solutionwith a pH value of 5.6919 when the solution is diluted to 44.517mL?
25 ml of 0.10 M acetic acid is titrated with 0.10 M NaOH. What is the pH at the equivalence point? Ka for acetic acid = 1.8× 10-5
A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35 g of the compound in water toform 0.250 L solution.
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