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A ground state H-atom absorbs a photon of wavelength 61.15 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 3043 nm to reach an intermediate level, and a second to reach the ground state. What was the wavelength of the second photon emitted?
a 55.0 gram piece of ice at 0.0 c is added to a sample of water at 8.0 c. all of the ice melts and the temperature of
Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7)
Determine the theoretical yield of H2S (in moles) if 4.0 mol Al2S3 and 4.0 mol H2O are reacted according to the following balanced reaction. A possibly useful molar mass is Al2S3 = 150.17 g/mol. Al2S3(s) + 6 H2O(l) ? 2 Al(OH)3(s) + 3 H2S(g) 18 mol..
a student combusts 504.96 grams of ethene gas c2h4. how many liters of co2 g are produced at a pressure of 0.993 atm
What is the molarity of aqueous lithium bromide if 25.0mL of LiBr reacts with 10.0mL of 0.250M Pb(NO3)2
4nh3 5o2 yields 4no 6h2ogiven 1.50g of nh3 reacts with 2.75g of o2 which is the limiting reactant? how many grams of
What impact does the presence of moisture in the unknown
Use bond energy values to estimate the reaction enthalpy for the formation of ammonia from nitrogen gas and hydrogen gas. Note that N2 contains a triple bond. You will need structural formula.
A 1.994g sample of ethanol, CH3CH2OH is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 10.91. If the heat capacity of the bomb is 615.5j/k and it contains 1.150kg of water, what is the enthalpy chnge per mol of et..
Write the VSEPR Aformula for the N atom as the central atom in glycine. What is the approximate C-N-H bond angle. Explain on the basis of VSEPR theory. What is the approximate O-C-O bond angle. Explain on the basis of VSEPR theory.
Consider this reaction involving an unknown element X. When 1.800 g of XBr reacts, 0.6758 g of Br2 is produced.
To resolve an object in an electron microscope the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 2.60 nm in diameter
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