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Compute the frequency in Hz and the energy in J using c= λv and c=2.998 x 108 m.s -1 and h=6.626 x10-34 J.s wavelengths used- 600nm, 400 nm, 450nm
A gas is confined to a cylinder under constant atmospheric pressure. When 415 J of heat is added to the gas, it expands and does 106 J of work on the surroundings. What is the value of \Delta H for this process? What is the value of \Delta E for t..
enormous numbers of microwave photons are needed to warm macroscopic samples of matter. a portion of soup containing
Write four equations (showing structures) for the reactions used in this experiment to separate and recover m-nitroaniline, benzoic acid, and naphthalene.
Explain why emission spectrophtometry has the ability to be much more sensitive than absorbance spectroscopy
what is the percent yield of the enzyme recovered in the purified fraction. what is the degree of purification (fold purification
The combustion of carbon with excess oxygen forming carbon dioxide is exothermic. C(s) + O2(g) => CO2(g) ?Hrxn = -393 kJ If 9,494kJ of heat is needed from the combustion
14 g of nitrogen is reacted with 6.0 g of hydrogen to produce 9 g of ammonia according to the chemical equation shown below. Determine the limiting reactant, theoretical yield of ammonia in grams, and percent yield of ammonia.
Calculate the wavelength of light (nm) emitted in the n= 3 --> 2 spectral transition in the hydrogen atom
Acid rain was at one time an important point of contention between the United States and Canada. Much of this acid was the result of the emission of sulfur oxides by coal-fired electricity-generating plants in southern Indiana and Ohio
Na2CO3+H3PO4=Na3PO4+H2O+CO2 find the limiting reagent if you strat with 450ml if 2.6M NA2CO3 and 88 grams of H3PO4, what is the maximum amount of grams you can make of Na3PO4? how many grams of the other starting martial is left over
Consider the following solutes and the composition of their aqueous solutions. In which of the following is the composition of the aqueous solution of the solute given
14.312g of magnesium nitrate were dissolved in water to produce 650ml of solution. The formual concentration of he solution.
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