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Consider a hydrogen atom in the ground state. What is the energy of its electron? b. Consider a hydrogen atom in an excited state of(2s^{1})What is the energy of its electron?
A compressed gas cylinder contains 1.00 x 103 g of argon gas. The pressure inside the cylinder is 2050 psi at a temperature of 18oC. How much gas remains in the cylinder if the pressure is decreased to 650psi at a temperature of 26oC?
calculate the pH of a solution contaning 0.2m acetic acid (pka=4.7) and 0.1 m sodium acetate? a. write the equation ph=pka+log [A-]/[HA]
Which of the following terms define(s) an acid according to the Bronsted-Lowry theory?
Na2SO4 is dissolved in water to make 450.mL of a 0.250 M solution. How many mles of Na2SO4 are needed
An automobile has a wavelength that is not measurable by human standards. If the car has a mass of 4000 lbs (1.81 x 103 kg) and travels at 60 miles/hr (26.8 m/s), calculate the wavelength of the car.
Determine the Ka value of acetic acid at 105 degrees C from the following data: A 0.3 Molar aqueous solution of acetic acid shows a pH of 2.642 at 105 degrees C. You can use the approximation formula here because the concentration of the acetic ac..
Calculate the equilibrium constant for the reaction of acetic acid and diethylamine. The pKa of protonated diethylamine is 10.94. What are the major forms present in a dilute soultion
Suppose a 500 mL solution contains 0.50 millimoles of Co(NO3)2, 100.0 millimoles of NH3, and 175.0 millimoles of ethylenediamine. What is the concentration of Co 2+ (aq) in the solution?
If the initial pressure of iodoethane is 894 torr at 245°C, what is the pressure of iodoethane after three half-lives?
write separate oxidation and reduction half-reaction for the procedure used in the test for nitrate ions.
For each of the following unbalanced equations, indicate how many moles of the second reactant would be required to react exactly with 0.275 mol of the first reactant. Show all work below.
A gas expands and does P-V work on the surroundings equal to 321 J. At the same time, it absorbs 177 J of heat from the surroundings. Calculate the change in energy of the gas.
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