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1. How would the observed molar mass of the unknown lioquid have been affected by the following circumstances (would it be higher, lower than the true value, or remain unchanged. a. because some portion of the neck of the flask was above the hot water level, not all the vapor in the flask was at the same temperature.b. some of the liquid had not yet vaporized when the flask was removed from the bath (assuming larger because more grams = more moles) c. while the flask was cooling some of the vapor effused through the foil pinhole in the cap.
2. when all the liquid has evapporated, the vapor totally fills the florence flask and exerts a pressure equal to the atmospheric pressure. why?
chemiluminescence reaction will actually occur very slowly in air. What component of air will bring about this reaction and what is its approximate concentration in air?
Find out the eq molar concentration of SCN- in the system.( Kc=[FeNCS2+]/[Fe3+][SCN-] =271.5)
A colorless liquid A (C3H6O) was soluble in water and ether, and had a boiling point of 94-96 degrees Celsius. It decolorized a Br2-CH2Cl2 solution and gave a positive ceric nitrate test
What was the molar solubility of CaCO3 in this solution (Kb1(CO32-) = 1.8 × 10-4)
Write the balanced equation for neutralization of sulfuric acid and sodium hydroxide. How many mL of a 0.2 M solution of sodium hydroxide would be required to neutralize
Osteo imperfecta displays a wide range of symptoms for mild to servere. On the bases of amino acid and collagen structure,
A researcher studying the nutritional value of a new candy places a 5.9 gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen.
A hot tub is filled with 470 gallons of water, which has a density of 1.0. How many kilocalories are needed to heat the water from 67 to 109?
What combustion products are produced when materials made from polyacrylonitrile smolder and burn?
Describe the apparent relationship between H30+ and OH- concentrations when an endpoint is reached in an acid-base titration.
2 NH3 + CH3OH → products . How much NH3 is needed to react exactly with 21 grams of CH3OH
What is the magnitude of the electric field amplitude associated with the beam and the corresponding photon density per cm3?
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