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What is the change in energy, Delta E, in kilojoules per mole of hydrogen atoms for an electron transition from n=8 to n=2? Express your answer in kilojoules per mole to three significant figures.
If the average collection period is 55 days, what is the receivables turnover?
sulfate pentahydrate are made into a solution with 512.441 g of water. What is the molality of the copper sulfate solution?
The concentration of this compound in the sample is 0.000030 M and the path length of the sample is 1.0 cm
The volume of an average stomach is about 1.0L. Suppose that a particular condition of acid indigestion is equivalent to the presence of a 0.50% HCl (by mass) solution.
What salt is produced in each of the following neutralization reactions?
determine the freezing-point depression of H2O if 77 g of sucrose (C12H22O11) are dissolved in 400 g of water
what is the remaining Ag+ ion concentration and is precipitation complete? The solubility product constant of AgBr is 5.0 × 10-13.
explain the following observations: a)an open can of soda loses its "fizz" more quickly at room temperature than in the refrigerator. b) chlorine gas in tap water escapes as the sample warms to room temperature. c)less sugar dissolves in iced coff..
If 1020C of charge is passed through a solution of AgNO3(aq), calculate the number of moles of silver deposited.
What is the pH change of a 0.300 M solution of citric acid (pKa=4.77) if citrate is added to a concentration of 0.140 M with no change in volume?
what is the minimum number of photons you would need to interact with these atoms in order to have all of their electrons promoted to the n = 3 level? What wavelength of light would you need to perform this experiment
Calculate the final volume of the gas,and express your answer in milliliters and determine the pressure in the flask if the temperature is raised to 25 degree celcius?
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