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Benzoyl peroxide, the substance most widely used against acne, has a half-life of 9.8 multiplied by 103 days when refrigerated. Assuming a first-order decay law, how long will it take to lose 8% of it potency (92% remaining)?
At 2000°C the equilibrium constant for the reaction is Kc = 2.4 x 10^3. , 2 NO(g)-> N2(g) + O2(g) If the initial concentration of NO is 0.100 M, what are the equilibrium concentrations of NO, N2, and O2?
If you have 500 ml of 10% SDS solution, how much SDS needs to be weighed out for 10% at 500ml
Which proton(s) in 1-phenylethanol corresponds to the tall singlet at about 7.40 ppm in the 1H NMR?
This standard reaction will only be spontaneous at high temperatures (T > 550 K) This standard reaction will only be spontaneous at low temperatures (T
Calculate the amount of solute in g needed to prepare 431.5 g of 8.85 %(m/m) LiNO3 solution.
What would the molecular orbital diagram for a compound made of equal portions of aluminum and phosphorous look like
A 303- sample of unknown solution reacts completely with to form 14.1 . What was the concentration of the solution?
Imagine that a beaker of pure water and another beaker containing water and some NaCl are both boiling under 1 atm pressure. Which of the following statements do you think is correct for this case
an ice cube of mass 8.5 is added to a cup of coffee whose temperature is 95 and which contains 130 of liquid. assume
Frank and Oswalt report a molar absoptivity of 4700 L mol -1 cm-1 for the thiocyanatoriron(III) ion. What % T would you expect for a solutions that is 1.0x10-4 M in thiocyanatoiron(III) ion, if the path length is 1.00 cm
Consider the reaction of sulfur dioxide and water, which is represented by the following equation: 2SO2(g) + 2H2O(g) ® 2H2S(g) + 3O2(g) How many moles of electrons are transferred according to the equation that is written
the water for the pan is not saturated with CO2. Will the reported percent CaCO3 in the original sample be too high, too low, or unaffected? Explain
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