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The ionization energy of an atom can be measured by photoelectron spectroscopy, in which light wavelength (lamda) is directed at an atom, causing an electron to be ejected. The kentic energy of the ejected electron (Ek)is measured by determining the velocity, v, since Ek=1/2mv^2. The Ei is then calculated using the relationship that the energy of the incident light equals the sum Ei + Ek.
(a) What is the ionization energy of rubidium atoms in kJ/mol if light with lamda=58.4nm produces electrons with a velocity of 2.450*10^6m/s? ( the mass ofan electron is 9.109*10^-31kg)
(b) What is the ionization energy of potassium in kJ/mol if light with lamda=142nm produces electrons with a velocity of 1.240*10^6m/s?
A mixture of FeO and Fe2O3 with a mass of 10.0 g is converted to 7.43 g Fe of pure Fe metal. What are the amounts in grams of FeO and Fe2O3 in the original sample
Compute the reactor volume and space time to get 90% conversion in a PFR and in a CSTR
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The first ionization energy of bismuth is Ei1 = +703 kJ / mol. What is the longest possible wavelength of light that could ionize an atom of bismuth?
An unknown gas has been determined to have the empirical formula CH2. At 27°C and 0.966 atm, the gas has a density of 1.65 g/L. What is the molecular formula of this gas
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Octane has a vapor pressure of 40. torr at 45.1 degrees celcius and 400. torr at 104.0 degrees celcius. What is its heat of vaporization (R=8.214 J/K mol)
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for this compound
A patient needs to take 625 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 625 mg dosage? Assume that these pills are scored and can be cut in half if ne..
calculate the heat energy released when 15.1g of liquid mercury at 25 degrees C is converted to solid mercury at its melting point
If a single pill contains 0.150 grams of KCN How much HCl in grams would be necessary to consume all of the KCN
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