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The following percentages of sulfate were found in a sample: 30.54, 30.34, 30.52 and 31.05. find the mean, the standard deviation, and the relative standard deviation. can any of the results be discarded
A 2.0 L glass soda bottle filled with air is tightly capped 18degC and 686mmHg. If the bottle is placed water at 95degC, what is the pressure in the bottle
the delta H OF vaporization for a new substance is 45 kj/mol and its delta H sublimation is 62 kj/mol, how much energy is needed for freezing 2.75 mol of a substance
The Vapor pressure of pure water at 25 Celcius is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by disolving 18.0 g of glucose (a nonelectrolyte, MW = 180.og/mol) in 95.0g of water
What is the pH of a solution that is 0.29 M in acetic acid, HC2H3O2, and 0.74 M in sodium acetate, NaC2H3O2, at 25°C? Ka of acetic acid is 1.8 × 10-5.
The first ionization energy of bismuth is Ei1 = +703 . What is the longest possible wavelength of light that could ionize an atom of bismuth?
a 29.0-g sample of water at 270. k is mixed with 48.0 g water at 340. k. calculate the final temperature of the mixture
Sodium carbonate was used to precipitate silver from a solution. 6.00 grams of silver carbonate were recovered from 1.500L of solution. What was the concentration in ppm of silver ions in the original solution?
You have a 1 L. container of a gas O2 at 20 degrees celcius and 1 atm. subtracting the weight of the container, what is the mass of the gas?
An empty beaker has a mass of 42.889 g. 10.00 mL of NaCl solution are placed in the beaker. The mass of the beaker and solutionis 54.129 g.
The equilibrium constant, Kp is 0.15 at 298 k for the reaction N2O4(g) 2 NO2(g) If the total pressure of the gas mixture at equilibrium
draw an electron-dot structure for hydrogen peroxide. write balanced chemical equations for reactions of hydrogen
The quantity of atmoshperic SO2 (g) can be determined by reaction with H2O2 (aq), according to the balanced chemical equation...
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