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Question- Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in which n = 2 to an orbital in which n = 7.
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Quinine emits fluorescence at the wavelength of 347 nm. An unknown quinine solution gave fluorescence reading of 400 (after background subtraction) at the 347nm.
a 100 ml stock solution contains 4.1 m na3po4. when 31 ml of the stock solution is diluted to 73 ml how many moles of
An aqueous solution is made by dissolving 0.17 mol MgCl2 in 550. g water. What is the freezing point of this solution
How many milliliters of 0.0820 M NaOH are required to titrate each of the following solutions to the equivalence point. (a) 40.0 mL of 0.0950 M HNO3
how many grams of copper are produced when excess aluminum reacts with 11.0 g of copper oxide.
calculate the H3O+ concentration in an aqueous solution at 25*C with an OH- concentration of 3.00 x 10^-2M
From a consideration of the Lewis structure of the thiocyanate ion, in which carbon has a double bond with both the sulfur and nitrogen atoms, what are the formal charges on the sulfur, carbon, and nitrogen atoms are, respectively
How does Le chatliers principle explain the effect of adding dry ice on a reaction of water and CO2 with sodium stearate
Question- Draw the structures of the cycloalkanes with the molecular formula C6H12 that have a four membered ring and two substituents on different carbons. Show all stereochemical isomers
Question- There is 11.70 g NaCl mixed with 100mL of water, please answer the subsequent questions and show your work. Formulas etc, The number of moles of NaCl
A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L · K)
A sample of hydrogen gas is mixed with oxygen gas. The mixture has a total pressure of 820 torr and the oxygen gas has a partial pressure of 32 torr. What is the partial pressure of the hydrogen gas
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