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Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 7 to n = 1.
Calculate the concentration of hydronium ions [H3O+] from the measured pH values. Express your answer in two significant figures. Show your all work.
Stearic acid is made by hydrolyzing fat from cattle. The fat, tallow, is predominately glycerin tristearate (formula C57 H110 O6 molecular weight 891.4g/mol)
CS2(l) + 3 O2(g) -→ CO2(g) + 2 SO2(g) . If 1.18 mol of CS2 is combined with 1.55 mol of O2, identify the limiting reactant.
0.1 M NaCl was slowly added would a precipitate(s) form? if more then one precipitate could form, predict the order of appearance of the precipitates.
Silver has two naturally-occurring isotopes with masses of 106.905092 amu and 108.904756 amu. What are the percent abundances of each isotope, respectively?
Write the net redox reaction.
Draw a flow sheet to show how you would separate the componenets of a mixture containing an acid substance,toluic acid, a basic substance, p-bromo-aniline and anthracene, a nuteral substance.
Calculate the number of moles of liquid propane that can be stored in the same volume if the density of the liquid is 0.590 {rm{g}}/{{rm{mL}}}.
what is the correct expression for computing the volume of gas at STP and determine What is the mass percent yield from 1.79 g of Sb in excess S, is obtained if 1.14 g of Sb 2 S 3 ?
Calculate the pH of a buffer solution (consisting of 30mL 1.0M NaA + 30mL 1.0M HA and a pH of 4.75) mixed with 2mL of 1.0M NaOH. (In class we got a calculated pH of 4.63 for the mixture of the buffer solution with 2mL 1.
A balloon has a volume of 1.20 at 24.0 degrees Celsius. the balloon is heated to 48.0 degrees Celsius. calculate the new volume of the balloon.
Fission of one mole of U-235 releases 1.9 x 1010 kJ. Calculate the number of kg of coal needed to produce the same amount of energy as the fission of 1 kg of U-235 (235.05g/mol)
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