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Line spectra from all regions of the electromagnetic spectrum, including the Paschen series of infrared lines for hydrogen, are used by astronomers to identify elements present in the atmospheres of stars. Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 2.179 x 10-18 J R = 1.096776 x 10^7 m-1)
A. 205.1 nm B. 384.6 nm C. 683.8 nm D. 1282 nm E. > 1500 nm
Determine the volume of the sample. (b) Plot the data. Now suppose you add another 5.00 mol of gas molecules into the same volume.
Can someone please help and draw out step by step mechanism for dehydration of 1-Methyl-1-cyclohexanol using phosphoric acid.
what compound was condensed in an adol reaction to produce (2E)-5-methyl-2-(1-methylbutyl)oct-2-enal
Given stock solutions of 0.02 M tris pH 7.4 and 4 M NaCl, how would you prepare 10.0 ml of a 0.5 M NaCl, 0.01 M tris pH 7.4 (how many ml of tris, how many ml of NaCl, how many ml of water)
Ammonium hydrogen sulfide decomposes according to the following reaction, for which Kp = 0.451 at a given temperature. If 55.0 g of NH4HS is sealed inside a 5.00 L container at this temperature, calculate the partial pressure of NH3(g) at equilibr..
calculate the solubility of silver sulfate in water at 25 degree celcius, express answer in molarity; and how would the solubility of silver sulfate change
Draw the organic product(s) of the reaction of p-methylbenzoic acid with LiAlH4, then H3O+ in the window below. If no new products are formed, tell OWL by drawing ethane, CH3CH3.
How many moles of table salt (NaCl) are in a box that has 117 grams of salt? (atomic mass of Na = 23.0; atomic mass of Cl = 35.4)
Balance the equations for the formation of HBr(g) and H2S(g) from their elements in their standard states. Include H°f for each reaction.
Common Ion Effect: The Ksp of silver iodide is 8.3 x 10^-17. What is the iodide ion concentration of a 1 L saturated solution of AgI to which .2 mole of AgNO3 is added
Find the pH of the equivalence points and the volume(mL) of 0.0372M NaOH needed to reach it in titrations of (a) 42.2mL of 0.052M CH3COOH (b) 28.9mL of 0.085M H2SO3
Which of the following ions have noble gas configurations- Fe2+, Fe3+, Sc3+, Co3+. Rank the following from most polar to least polar: N2, HF, HCN, H2O
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