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The series in the He spectrum that corresponds to the set of transitions where the electron falls from a higher level to the nf = 4 state is called the Pickering series, an important series in solar astronomy. Calculate the Pickering series wavelength associated with the excited state ni = 8. B)What region of the electromagnetic spectrum does this transition fall in? gamma ,x-ray ,visible ,radio ,microwave ,infrared ,ultraviolet
Give the structure of the phosphorus ylide and carbonyl compound you might use to prepare the following alkenes
How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas?
How many grams of Helium does a 25.0 Liter balloon contain at 102.0 kPa and 24 degrees Celsius?
the equilibruium constant Kc for the reaction A(g)+ B(g)----> C9(g) is 0.76 at 150C. If 0.800 mol of A is aded to 0.600 mol of B in a 1.00-L container at 150degrees C
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath. To what temperature (oC) will the oil bath need to be heated to first ..
25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0 C. The balloon is then cooled to 5.0 C, and the pressure is found to be 0.750 atm. What is the volume of the gas under the new conditions?
How much heat is released to the surroundings when 1.5 moles of water cools from 150 to 20 at 1 atm? Note that the constant pressure heat capacities, , for water in vapor and liquid form are 36.4 and 75.3 respectively.
Calculate the pressure in the flask in atmospheres and torr also If the sealed-tube manometer in had a height difference of 20.0 inches between the Hg levels?
The molecular weight of the protein is 3.4e4 grams per mole. What is the molar concentration of the protein?
how many millimeters of 5M NaOH are needed to neutralize 40mL of 2M H2SO4
While in Europe, if you drive 105 km per day, how much money would you spend on gas in one week if gas costs 1.10 rm euros per liter and your car's gas mileage is 41.0 mi/gal? Assume that 1; rm euro = 1.26; dollars.
A 4.78 g sample of aluminum completely reacts with oxygen to form 6.67 grams of aluminum oxide. Use this date to calculate the mass percent composition of aluminum in aluminum oxide.
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