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Question- What is the wavelength, in nm, of the line in the hydrogen spectrum when one n value is 1 and the other n value is 5? Enter answer to nearest nanometer.
Be supposed to answer all parts thus I can get five stars
a assessor is measuring the perimeter of a rectangular lot. he measures two adjacent sides to be 50.11 plusmn 0.05 m
What is the stoichiometric coefficient for oxygen when the following reaction is balanced using the smallest whole number coefficients?
Consider the following thermochemical equations : 8Mg(s) + Mg(NO3)2(s) ? Mg3N2(s) + 6MgO(s) ?H°rxn = -3884 kJ Mg3N2(s) ? 3Mg(s) + N2(g) ?H°rxn = +463 kJ 2MgO(s) ? 2Mg(s) + O2(g) ?H°rxn = +1203 kJ Use the above equations to calculate the ?H°f (in k..
After 20 days, the sample was fixed utilizing the Winkler method and titrated using a 0.0125 M sodium thiosulfate solution to a starch-iodide endpoint after addition of 6.26 mL of the sodium thiosulfate solution. Define what is the BOD20 and the ul..
Problem- Naproxen is a commercially important anti-inflammatory agent. A solution of 1.138g of naproxen in 25.00 g of benzene has an osmotic pressure of 4.00 atm at 20oC. The solution volume is 29.75mL. Calculate the molar mass of naproxen, assumi..
Problem- Robinson predicted a carbocation intermediate in the addition reaction of an alkene and CL2. What experimental evidence contradicts this mechanism
calcuium hydroxide in an acid-base titration to neturalize an acid to the equivlant point. How many mols of potassium hydroxide would be needed to complete the same neutrization?
If 34.0 mL lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.640 g precipitate, what is the molarity of lead(II) ion in the original solution?
Explain what is the area of the region in the first quadrant enclosed by the graphs of y = cos x, y = x, and the y- axis
For a certain gas that contains merely carbon and hydrogen the mass percentage of hydrogen is known to be 14.37. It is as well known that 3.08g of the gas has a volume of 1.00L as well as a pressure of 0.970atm at 50.1 degrees Celsius. Explain w..
what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25'C.
Clearly indicate coordinate system used in finding the answer. Basically trying to work up to building the molecular orbital diagram. I am stuck in the step where you determine the transformation sequences of each symmetry subset.
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