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If an atomically clean metal surface is generated in a vacuum system whose pressure is kept at 1.00 x 10^-12 Torr, how many atoms of oxygen per second are colliding with each square centimeter of the surface? The residual gas in the system has the same composition as air, and the temperature is 295K
calculate the external pressure that must be applied to seawater, 1.14 M total ion concentration at 10 degrees celcius if the maximum concentration allowed in the product water is 166 mg/L
How would you expect the amino acids glycine, alanine, and phenylalanine to travel relative to each other on the silica plates using a mixture of chloroform/methanol/ammonia? Explain your answer.
The atmospheric sulfur dioxide concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume the dissolution of SO2 does not affect its pressure.
Carbon and silicon belong to the same group and are known to have similar properties. Do you think that silicon can replace the role that carbon plays
There is an alternative procedure that uses K2CO3 instead of NaOEt; why can NaOEt or K2CO3 be used for the phenacetin synthesis
if the freezing point of a 0.107 m CH3COOH solution is -0.200°C, calculate the percent of the acid that has undergone ionization.
If a total of 13.5 mol NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of COs and NA3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)
A certain first-order reaction () has a rate constant of 6.90×10-3 at 45 . How many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?
Calculate the molar absorptivities for In- at 454 and 654nm, set up two simultaneous equations, and determine the molar concentrations of HIn and In- in the buffer solutions
Perkin and related reactions, There are numerous condensations that are closely related to the Perkin reaction
I need help describing an experiment where one could measure the value of the extinction coefficient of a solution with a concentration (c mol/L) of chlorophyll in water for a given wavelength.
In the decomposition of hydrogen peroxide, the percentage yield of oxygen is 93%. What is the actual yield in grams of oxygen if you start with 100 grams of H2O2.
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