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during a strenuous workout an athlete generates 2050.0 kJ of heat energy. What mass of water would have to evaporate from the athletes skin to dissipate this much heat?
note at 100 celsius the molar heat of vaporization of water is 40.67 kJ/mol at 25 celsius room temp the molar heat of vaporization if water is 44.0 kJ/mol
Calculate the partial pressure of ozone and the number of ozone molecules per liter of air if the temperature and pressure were 20.0 °C and 758 mmHg, respectively.
10 ml of a silver nitrate solution is titrated to the equivalence point with 8.5 ml of a .1100 M HCL solution. What is the concentration of the silver nitrate?
What is the mass flow rate of methane into the heat exchanger? 162 kg/min, What rate of heat is supplied to the methane stream in order to heat it from 35.0°C to 75.0°C? 250 kW
Calculate the osmotic pressure generated when 14.6 grams of estrogen are dissolved in 275 ml of a benzene solution at 298 K. What is the molarity and osmotic pressure
Ascorbic Acid (Vitamin C) is diprotic acid (Ka1= 8.00x10^-5 and Ka2= 1.60x10^-12). What is the pH of a 0.250M solution of ascorbic acid?
A solution contains 4.64g KCl in 178 mL of solution. The density of the KCl solution is 1.14 g/mL. What is the molarity,M, for the potassium chloride solution?
Acid-catalyzed dehydration of cyclobutylmethanol proceeds via an E1 mechanism and gives two alkenes
Consider the reaction CaCN2 + 3H2O ->CaCO3 + 2NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
calculate the molarity of acetic acid in a vinegar sample knowing that 5.00 mL of vinegar requires 43.50mL of 0.105M NaoH to just reach the phenolphtalein endpoint in a tritration
how many milliliters of 0.2 M KOH are required to titrate completely 650 ml of 0.05 M citric acid
Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in a 100 mL of a 100 mM Tris-HCl buffer solution at pH 8.1? Note that the 100 mM refers to the sum of Tris and Tris-HCl concentrations. Answer in mmols
What mass of zinc can be plated onto a metal sheet (a process call "galvanizing") from an aqueous zinc sulfate solution using a 0.755 amp current for 1.50days
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