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Compute the number of electrons in a flake of pure gold valued at $0.15. Assume that the price of gold is $1762.0/troy oz. (1 troy oz = 31.1 g)
Sea-level atmospheric pressure is approximately 14.7 pounds per square inch. From this fact, we can deduce that a column of air one square inch in cross-section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lb. Given that air has an average molar mass of 28.97 g, calculate the number of moles of air in the column.
a sample of propane, contains 17.7 moles of carbon atoms. How many total moles of atoms does the sample contain.
A 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml.
Assuming ideal behavior, calculate the mole fraction of toluene in the solution.
if you prepare a 1.00 solution of beginning with water at 27.5 what is the final temperature of the solution in ?
Write the net redox reaction.
A J tube is filled with air at 22C and 760 Torr. The long arm is closed off at the top and is 100 cm long. The short arm is 40 cm. Mercury is poured into the short arm with a funnel. What is the pressure on the air when Hg starts to spill out.
Calculate the pH at 25 degrees C of a 0.25-M aqueous solution of oxalic acid (H2C2O4). (Ka1 and Ka2 for oxalic acid are 6.5 x 10^-2 and 6.1 x 10^-5, respectively.)
Discuss the typical features of a calomel electrode and a silver - silver chloride electrode. What are their standard half cell potentials?
Given the reaction C6H12O6 + 6O2 = 6CO2 + 6H2O How many grams of water are produced when 360 g of glucose are burned
When hcl and nahco3 are mixed together, a chemical reaction takes place in which a gas is one of the products. What is the molar mass of a sample of gas
A 4.70 g nugget of pure gold absorbed 260 J of heat. The initial temperature was 28.0°C. What was the final temperature.
Calculate the density of a solution of benzene and toluene mixed at 1:1 weight ratio at 20 degree C and 1 atm, given that ?(benzene) = 0.8790 g/cm^3 and ?(toluene) = 0.8668 g/cm^3 at 20 degree C and 1 atm.
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