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Use the Boltzmann equation to calculate the excited-state and ground-state population ratio for HCl (g*/g0=1) at room temperature (25 oC). The frequency of the absorption from the ground to the excited state is 2885 cm-1. What is the population ratio when temperature goes up to 50 oC?
What is the animal's initial radiation exposure in curies? b. If all of the energy from the emitted alpha particles is absorbed by the animal's tissues, and if the energy of each emission is 7.77 x 10^-12 J
If a sample of 0.188 grams of KCN is treated with an excess of HCL, calculate the amount of HCN formed, in grams.
calculate the number of moles of the compound that could theoretically be generated. Use the value ?G°\'compound X = -62.3 kJ/mol. Round your answer to two significant figures.
The velocity of the electron ground state hydrogen atom is 2.2x10^6 m/s. What is the wavelength of this electron in m
If you add a solvent called "dioxane" to water, a homogenous mixture forms. Dioxane and water have the same boiling point (100oC). How do you explain that the mixture of the two compounds shows a boiling point that is lower than the one found for ..
Calculate the amount of 10.00% acetic acid you will need to add to 100.0 mL of your milk in order to bring the final acidity to 1.00% acetic acid.
You have a sample of bone collected from Nevada and you find that it contains strontium-90 and exhibits an activity of 2.5 Bq. How much strontium-90 was present in the bone when the animal died 45 years ago?(The half-life of 90Sr is 29 years.)
How many mL of 0.425 M NaOH are needed to react completely with 25.0 mL of 0.250 M Fe Cl3 solution. FeCl3 aq + 3NaOH arrow to Fe(OH)3 aq +3NaCl aq
60.0 mL of a 0.450 M HNO_3 solution is titrated with 0.570 M KOH. Calculate the volume of KOH required to reach the equivalence point.
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C.
A student takes 185. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
this solution was added 1.960 grams of KI and 50.00 mL of a 0.00923 M KIO3 solution. The excess I3- was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
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