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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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Using heat of fusion, specific heat of water, and/or heat of vaporization, calculate the amount of heat energy in each of the following. calories to condense 135 g of steam at 100^{circ}{rm C} and to cool the liquid to 15^{circ}{rm C} (two steps)
If a person is given Benzene, phenol is the chemical found during the elimination process. How does this happen
Explain what is the minimum pressure in kPa that must be applied at 25 C to acquire pure water by reverse osmosis from water that is 0.176 M in sodium chloride as well as 0.031 M in zinc sulfate. Presume complete dissociation of electrolytes.
Problem- "An aqueous solution that is 50.0 percent sulfuric acid (H2SO4) by mass has a density of 1.105 g/ml.:" A. Determine the molarity of the solution.
Problem- What are two elements next to each other that have decreasing atomic masses on the periodic table
Let's abbreviate the fully protonated form of the diprotic amino acid alanine (NH3+-CHCH3-COOH) as H2L+. Find the pH and concentrations of H2L, HL, and L- in
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 74% of the Mg2+ be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9* 10-12.]
under constant-volume conditions the heat of combustion of benzoic acid c6h5cooh is 26.38 kjg. a 1.640-g sample of
What ions will you find in solution. You want to separate the calcium from iron by addition of Na3PO4. The Ksp for Ca3(PO4)2 (s) is 1.3x10-32 and that for FePO4(s) is 1.0 x 10-22. Identify the precipitate that forms first. Is the separation succes..
If heat is given off by a system then the heat has a negative sign If work is done on a system then the work has a negative sign Work, heat and temperature all have units of joules The 1st law of thermodynamics is represented
what is the partial pressure of argon? If the two flasksare connected through a stopcock and the stopcock is opened, whatis the total pressure?
Question- Acetone shows a single sharp peak at 2.1 ppm in its proton NME spectrum when recorded on a 90 MHz instrument. What would be the position of the peak [(a) in ppm and (b) in Hz] if it were obtained on a 400 MHz instrument. Briefly explain ..
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