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Calculate the molar mass of naphthalene given that a solution of 2.11g of naphthalene in 100g of benzene has a freezing-point depression of 0.85 degrees C.
The human eye is able to detect as little as 2.35 × 10-18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light that can be detected by the human eye. Physical constants can be found here.
Explain (using chemical equations) why NaOCl (bleach) is not terribly effective at killing bacteria in pools or tubs where the water has become acidic over time.
25.0 ml of 0.212 M NaOH ia neutralized by 13.6 ml of an HCl solution. The molarity of the NAOH solution is?
Which would have a higher energy of activation and why, nitration of 4-bromonitrobenzene or nitration of bromobenzene
You have a volume of 100 L at a concentration of 100 PPM of benzene. If you later sampled from this known concentration at a temperature of 15° C
Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00-g sample of each compound. One sample contains 0.32 g of X and the other contains 0.41 g of X. Identify plausible sets of formulas for these two compoun..
What is the pH of a soft drink in which the major buffer ingredients are 6.6 g of NaH2 PO4 and 8.0 g of Na2HPO4 per 355 mL of solution
Assume ideal behavior of diatomic gas and ignore the changes in the number of moles of gas during combustion.
What is the total pressure, in mm Hg, of a gas mixture containing argon gas at 0.25 atm, helium gas at 350 mm Hg, and nitrogen gas at 360 torr
calcium reacts with oxygen to make calcium oxide cao. what is the maximum mass of caos in grams that could be prepared
If the pH probe was miscalibrated and reports the pH and reports the pH to be 1 unit higher than the true pH of the solution it is in, would the molar mass you report for the solid acid be higher than
The value of the gas constant is 0.08206 L x atm/(mol x K). You may also find the conversion factors 1 atm = 760 torr and Tk = Tc + 273 useful.
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