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Indicate which of the following sets of quantum numbers in an atom are unacceptable. More than one answer could be right!
a) 1,1,0,-1/2
b)3,2,+1,1
c)2,1,1,-1/2
d)2,1,-1,1/2
A 100.-L flask contains a mixture of methane (CH4) and argon gases at 25 degrees Celsius. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy of the gaseous mixture.
what was your sampling rate to the nearest 1 ml/min over a four hour sample period if you collected 35 mg of carbon tetrachloride from a known concentration of 150 PPM?
An unknown compound burned with a yellow, nonsmoky flame and was found to be insoluble in 5% sodium hydroxide solution but soluble in concentrated sulfuric acid.
A chemist titrates 20.00 mL of 0.2000 M HBrO ( Ka= 2.3 x 10^-9) with .1000 M NaOH. What is the pH? A) Before any base is added? B) When [HBrO] = [ BrO-] C) at the equivalence point
Example: Determine the solubility of calcium fluoride at 25C. And Be sure to note the difference between Solubility and Solubility Product Constant ! What could we do to change the system and produce a precipitate?
NaOH is added to K2CrO4 and K2Cr2O7 separately in test tubes and a color change is noted.
You are looking for a range so you need to find the Ksp of the first test tube that did not have precipitate and the last test tube that had precipitate.
What is the pH at the point during a titration when 22 mL of 0.200 M HCl has been added to 33 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3. Answer in units of pH
how many different alkenes will be produced when each of the following substrates is treated with a strong base? a) 1-Chloropentane
Find the neergy of a photon of ultraviolet light whose frequency is 2 x 10^16 Hz. Do the same for the photon of radio waves
When are covalent bonds most likely to form? a. between 2 atoms with a high ionization energy b. between 2 with a low ionization energy. c when one atom high and other low d. no correct choice. (I'm leaning towards a.)
If a 484 mL sample of gas at 232 °C is allowed to expand (at constant pressure) to a volume of 494 mL, what will be the new temperature (in °C).
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