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Question- 1) Calculate the wavelength of a photon, in m, needed to excite a hydrogen atom from the ground state to the n= 5 state
2) Calculate the frequency in 1/s of a photon with wavelength 733 nm.
3) Calculate the energy of a photon, in units of J, with frequency 65.42 MHz.
I am stuck in between this question please help me out
A voltic cell with an aqueous electrolyte is based on the reaction between Cd2+ (qu) and Mg(s), producing Cd (s) and Mg2+. Write a balanced cell reaction.
The enthalpy for oxidation of diamond by oxygen to carbon dioxide is -395.4 kJ/mol but the enthalpy for oxidation of graphite to carbon dioxide is -393.4 kJ/mol. Find the enthalpy of reaction for graphite going to diamond.
Did an experiment in which we reacted magnesium and bromobenzene to make phenylmagnesium bromide, then added it to CO2 to get benzoic acid.
An optical fiber for something is made SiO2 glass (density = 2.2 Mg/m^3). How many Si atoms and how many O atoms are present per millimeter of length of a fiber 10 µm in diameter
on a cold dry morning after a frost the temperature was -5c and the partial pressure of water in the atmosphere fell to
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A gas mixture in a 4.600 L container at 415°C contains 1.00 g each of Ar, CO, and CH4. Find the partial pressure of CH4. Enter units.
How and why is the average enthalpy of the reaction changed when a different concentration of sodium hydroxide is used
The compound MgSO4 is called Epsom salts. How many grams will you need to prepare a bath containing 5.80 moles of Epsom salts? Express your answer using three significant figures.
How much heat is liberated by the combustion of 183 g of hydrogen? ΔHcomb = -286 kJ/mol.
The heat of fusion of ice (the heat associated with ice melting) is 6.0 kJ/mol. Find the temperature of the coffee after the ice melts.
Explain what is the wavelength of light emitted when an excited electron in hydrogen atom falls from the n=5 level to n=2? use nanometers
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