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Nitrogen dioxide (NO2) cannot be contained in a pure form in the gas phase because it exists as mixture of NO2 and N2O4. At 25°C and 0.98 atm, the density of this gas mixture is 2.4 g/L. What is the partial pressure of each gas?
Fluorescence resonance energy transfer (FRET) is a common technique to measure distances between donor (D) and acceptor (A) fluorescent molecules
The ionization constant Ka of benzoic acid is 6.3x10^-5. calculate th equilibrium concentrations of H+, benzote anion and benzoic acid. The initial concentration of benzoic acid is .10 M.
If the density of a 40.0 mass % solution of ethylene glycol in water is 1.0514 at 20 degrees celsius what is the molarity
what mass of magnesium in reaction with an excess of hydrochloric acid is needed to produce 128 ml of hydrogen h2 gas?
what can you say about the relative buffering abilities of solutions( ranging pH 5-7) when they are challenged by acid
Calculate how many calories of heat are needed to increases the temperature of 550 grams H2O from 12 degree celsius to 18 degree celsius?
what the oxidation state P in PO4^-2? what the oxidation state O in PO4^-2?
Show a series of reactions by which acetylene and an alkyl halide could be converted into 2-pentanol. Show all steps and all needed reagents/conditions.
Assuming ideal behavior, calculate the mole fraction of toluene in the solution.
20.0ml of 0.150M Zn(NO3)2 are mixed with 20.0ml of 1.00 x10-4M Na2S. Calculate the amount of milligrams of ZnS (s) that will precipitate. (Ksp = 1.6 x10-24)
Explain the structural feature of Acetanilide molecule - Identify one structural feature of the acetanilide molecule
A 120 pound woman working in an office consumes about 2200 kcal/day, whereas the same woman climbing a mountain needs 3400 kcal/day.
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