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A solution is made from 96 g of a nonvolatile solute in 80.0 grams of water. The solution has a vapor pressure of .312 atm at 75°C. Calculate the molar mass of the nonvolatile solute. The vapor
As well as 3 fractions of a mixture of hexane& heptane. Which, if any, of the fractions obtained from each of the two distillations conducted in this experiment had boiling point ranges that sug
What would be the result if we heated a mixture of dichloromethane (bp 39-40 degrees Celsius) and napthalene (C10H8, mp 80-82 degrees Celsius and bp 218 degrees Celsius) to 60 degrees Celsius, colle
Pure benzene has a normal freezing point of 5.5°C. a solution containing 11.4g of a molecular substance dissolved in 150.0g of benzene (Kf=5.12°C/m) has a freezing point of 1.20°C. what
In July in Los Angeles, the incident sunlight at ground level has a power density of 1.2 kW m-2 at noon. A swimming pool of area 50 m2 is directly exposed to the sun. What is the maximum rate of lo
Describe the mechanisms of SN1 and SN2 reactions,and Summarize the nucleophile, electrophile and solvent characteristics that would favor each.
A flash drum is a vessel in which a liquid stream is heated until some of it is vaporized and the liquid and vapor phases reach equilibrium and are removed as products.
Draw reaction mechanisms for the E1, and the two E2 reactions. Predict the major products for these reactions, based on the mechanisms and the stability of the products.
Suppose that there is something in your sample that is absorbing at the same wavelength as the material you are looking at. Will your measured %T be too high or too low?
Assume that the activation energy for a certain reaction is 173 kJ/mol and the reaction is started with equal initial concentrations of reactants. How many times faster will the reaction occur at 4
A 25.00-mL sample of orange drink with 2 g of KI and 25.00 mL of 0.0131 M KIO3 added was back-titrated with a 0.0302 M sodium thiosulfate solution.
How long does it take a person at rest to breathe one mole of air if the person breathes 78.0 mL/s of air that is measured at 25 degrees Celcius and 755 mmHg?
Illustrate the changes in concentrations (x) using ICE scheme (initial, change, and equilibrium concentrations) for the reaction.
The reaction 2Al + 3MnO ----> Al2O3 + 3Mn proceeds till the limiting substance is consumed. A mixture of 220g Al and 400g MnO was heated to initiate the reaction. Which initial substance remaine
How much boiling water would you need in order to raise the bath to body temperature (about 37)? Assume that no heat is transferred to the surrounding environment.
Natural gas is primarily methane, CH4, and is used to heat homes. A typical home is approximately 2000 ft2 and the ceilings are 8 ft high. The following data may be helpful:
Calcium carbide (CaC2) can be made by heating calcium oxide (lime) with carbon (charcoal).? CaO(s) + 3 C(s) + heat As†' CaC2(s) + CO(g) Î"H = +464.8 kJ
The heat of combustion of ethanol, C2H5OH(l) , is -1367 kj/mol. A batch of Sauvignon Blanc wine contains 10.6% ethanol by mass.
A 25mL portion of an unknown monoprotic acid solution was titrated with 1.5 M NaOH. It was found 20mL of this base was required to neutralize the sample. What's the molarity of the unknown acid sol
A chemist measures the vloumes of 1.00 mole N2 and 1.00 mol SO2 and finds they differ by 0.30 L. Which gas produced the larger vloume? Do the results contradict the ideal gas law?
Devise an experiment to determine the amount of vitamin C in orange juice in an 8 oz glass, assuming that this is 8oz sample contains a day supply of vitamin C.
A Given substance is a white solid at 25 deg. celsius. it melts at 150 deg. celsius without decomposing, and the melt does not conduct electric current. what would be the classification of the subst
Reasonable efficiency for converting chemical energy to electrical energy via combustion is 30%. Calculate how many pounds of coal must be burned to run your reading lamp for two hours of studying f
A beam of microwaves corresponds to a flux of ( 1.1x10^0 x 1020) photons per second with a wavelength of 2.0 cm. Calculate the power carried by the beam.
Aspirin is a weak acid (pKa=3.5). When it enters the body, the undissociated form of the acid can freely permeate membranes where the dissociated ions cannot.