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Problem- What is the wavelength of energy emitted from by hydrogen atoms when they undergo n=5 to n=4 transitions
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calculate the buffer capacity of a 0.05m salicyclic acid solution at pH7. at what pH is the buffer capacity maximum?
Explain how much heat in kJ is required to increase the temperature of 125 gH2O from 2.2°C to 48.6°C? The specific heat of water is 4.18 J g-1 °C-1.
0.113 m aqueous solution of a weak acid, HA, is 2.23% ionized. At what temperature does it freeze? Kf for water = 1.86o C/m.
There may be 1014 of methane hydraate in the permafrost below the ocean floors. If 1% of this were to melt per year, explain what would be the increased concentration of methane (ppmv y-1) in the atmosphere. Explain what sinks for methane would pl..
hydrogen gas has a henrys constant of 7.8 x 10-4 molkg . bar 25 degrees celcius when dissolving in water. if the
The alcohol content of hard liquor is normally given in terms of the "proof," which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 81-proof gin. The density o..
A reaction mixture initially contains a Br2 partial pressure of 755 torr and a Cl2 partial pressure of 725 torr at 150 K. Calculate the equilibrium partial pressure of BrCl.
What is the concentration of the vitamin C standard solution? Using a balance, 125mg of Vitamin C was weighed out and was added to a 100-mL beaker and dissolved in 50mL of DI water.
the energy required to melt 1.00 g of ice at 0 degrees celcius is 333 j. if one ice cube has a mass of 62.0 g and a
One way to approach the problem is to imagine the reaction proceeds to equilibrium by first going 100% to completion and then backing up a little
First Order Kinetics: A worker in a hazardous waste recycling facility inhales and absorbs toulene at a rate of 22 micrograms / hour. He excretes 2 L per day containing 18 micrograms / liter toulene
Calculate the percent yield of salicylic acid (from 1.00 mmol isolated) from 7.00 g of Ben-Gay ointment. Ben-Gay ointment is 16% menthol
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