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How much energy is emitted when electron in hydrogen atom undergoes a transition from n=5 to n=2 level? what is the wavelength of this emission? what is the frequency?
Cavendish prepared hydrogen in 1766 by rather quaint method of passing steam through a red hot gun barrel. H2O + Fe ---> Fe2O3 + H2 (unbalanced) What volume of H2 at a pressure of 820 torr and a temperature of 23C can be prepared by a reaction of ..
a sample of argon gas is at a pressure of 1.24x10^4 kpa and a temperature of 24c in a rigid 25-L tank. How many moles of argon does this tank contain?
How much of the 37.0% HCl concentration stock do you need to prepare this solution?
Given the initial rate data for the reaction A+B->C, determine the rate expression for the reaction. [A], M [B], M delta[C]/delta t (initial) M/s
How are gases affected under different atmospheric pressures? In what ways might this affect you if you are moving to a different elevation?
Which plot would not have a slope from which the indicated quantity for the reaction A ? Product(s) could be determined
Write the electron configuration in spectroscopic notation starting with the preceding inert (please also explain a lil bit if you have time) gas for the following. Tell whether each is paramagnetic or diamagnetic.
A buffer (pH 3.70) was prepared by mixing 1.00 mole of formic acid and 1.00 mole of sodium formate to form an aqueous solution with a total volume of 1.00 L.
The half-life of tritium (31H) is 12.3 years. If 47.0 mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the nuclide will remain after 24.6 years?What mass of the nuclide will remain after 98.4 years?
When the concentrations of CH3Br and NaOH are both 0.165 M, the rate of the reaction is 0.0050 M/s. (c) What is the rate of the reaction if the concentrations of CH3Br and NaOH are both increased by a factor of four?
The initial mass of the the crude ether was 141 mg. The mass after recrystallization was 121 mg. Calculate the percent recovery from recrystallization.
What is the volume of 455 mL of oxygen gas at 67.0°C and 300. mm Hg if the conditions are adjusted to 890. mm Hg and 107°C? Assume the amount of gas is held constant.
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