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Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n = 1 and the atom absorbs a photon of light with an energy of 2.044 × 10-18 J.
The normal boiling point for H2Se is higher than the normal boiling point for H2S . This can be explained by larger dipole-dipole forces, larger dispersion forces, and larger hydrogen-bond forces for H2Se
ch4202co22h20 h.889.1kjhfh20-285.8kj hfco2-393.5kjwhat is the standard heat of formation of methane ch4 as calculated
Arrange the following elements in order of increasing ionization energy, and explain how you know the order
A typical hot pack is designed to reach a temperature of approximately 50 degrees Celsius starting from room temperature at about 20 degrees Celsius. Assume that the hot pack will contain 100.0 mL of water.
a calorimeter contains 34.0 ml of water at 13.5 circc. when 1.80 g of rm x a substance with a molar mass of 70.0 gmol
Mesitylene is a liquid hydrocarbon. Burning 0.115 g of the compound in oxygen gives 0.379 g of CO2 and 0.1035 g of H2O. What is the empirical formula of Mesitylene?
The electron in a hydrogen atom falls from an excited energy level to the ground state in two steps, causing the emission of photons with wavelengths of 2624 nm and 97.2 nm, respectively.
Calculate the freezing point of the following solutions, assuming complete dissociation. Part A= 0.114mK2S Part B=20.5g of CuCl2 in 401g water Part C=6.5% NaNO3 by mass
What is the value of the reaction quotient (Qc ) for the reaction below if a 2.75-L flask contains 0.0282 mol NO2(g) and 0.612 mol N2O4(g) at 25°C
A researcher determines that 744 J of energy needed to vaporize a 355-mg sample of a liquid at its boiling point. Determine the heat of vaporization and heat of condensation of the substance
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
If the pressure of the ocean breaks the submarine forming a bubble with a pressure of 250 atm pushing on it, how big will that bubble be?
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