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Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 4 to n = 1. I need an explanation of the formula too.
A sample of chlorine, which has an average atomic mass of 35.86, consists of two isotopes with mass of 35 and 37. What is the percent (to 0.1%) abundance of the 37 isotope?
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
Calculate the wavelength of the electromagnetic radiation required to excite an electron from the ground state to the level with n = 5 in a one-dimensional box 39.8 pm in length.
Acetyl chloride reactions, What major organic products would you expect to be formed when acetyl chloride reacts with the following reagents?
closed container and the mixture is ignited the reaction products are CO2 and H2O. If 61.6 g of CO2 are actually produced in the reaction , what is the percent yeild of CO2?
Which statement(s) is(are) true about X which has a molecular ion peak in its mass spectrum at mass 164?
The analysis of this compound shows that it contains 41.8 percent C, 4.7 percent H, 37.3 percent O, and 16.3 percent N. Calculate the molecular formula of the compound.
Use the density of copper (8.95 g/cm3) and its molar mass (63.55 g/mol) to calculate an approximate atomic radius for copper.
Liquid carbon disulfide burns in oxygen to form carbon dioxide and sulfur dioxide gases. Calculate the number of oxygen molecules it would take to consume 500 molecules of carbon disulfide
A buffer that contains 0.255 M of acid, HA and 0.153 M of its conjugate base A-, has a pH of 3.39. What is the pH after 0.0115 mol of NaOH are added to 0.666 L of the solution
For IF5 draw an appropriate Lewis structure.
Manganese dioxide reacts with hydrochloric acid as shown in the chemical equation MnO2(s) + 4HCl(aq)-->MnCl2O(l) + Cl2(g) What is the percent yield of the reaction if 5.75 g of H20 is obtained when 28g of MnO2 and 28g of HCl are mixed and allowed ..
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