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What is the wavelength (in nm) of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =3 to the orbital with n = 2?HINT: Look up Rydberg equation - in Lecture Notes B.
Note, the line corresponds to the energy of the photon that is emitted in the transition.
when using a rotary evaporator, the water bath is typically kept at a temperature below the normal boiling point of the solvent to be evaporated
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 rm J/(g cdot {^circ C}) and 1.00 rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.
3.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 234 grams of water initially at 25.00 ? C. After the combustion, the temperature is 26.55 ? C
A 0.7549g sample of a pure hydrocarbon burns in oxygen gas to produce 1.9061g of carbon dioxide and 0.3370g of water.
Calculate the pH of a buffer solution prepared by dissolving 0.200 moles of benzoic acid (C6H5COOH) and 0.450 moles of sodium benzoate (C6H5COONa in enough water to make 1.00 L of solution
Electrophilic addition reaction of conjugated dienes that occur at high temperatures and/or long reaction times (reversible conditions) are said to be under
a sample of sodium hydrogencarbonate, NaHCO3 is contaminated with 5-10% NaCl. How should i carry out an experiment to determine the percentage purity of NaHCO3 ?
An Ice cube tray holds 325 grams of water. If the water initially has a temperature of 25 C, how many kilojoules of heat must be removed to cool and freeze the water 0 C?
56.9 mL of water is added to 24.9 mL of 0.125 M KOH solution. What is the new molarity?
1) Suggest a reason why the starting material (trans-1,4-diphenyl-2-butene-1,4-dione) should be recrystallized prior to use in the photochemical isomerization of an alkene.
Five metal rods (Copper, Iron, Nickel, Tin and Zinc), at room temperature, of equal mass are place in a 100 oC water bath. Which metal will reach 80 oC first.
The minimum energy required to break an oxygen-oxygen bond in ozone (O3) is 387 kJ/mole. What is the longest wavelength of light
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