What is the mole fraction of ethanol in the solution
Question: At 63.5 degrees celsius, the vapor pressure of water is 175 torr and that of ethanol, C2H5OH, is 400 torr. A solution is prepared by mixing equal masses of H20 and C2H5OH. What is the mole fraction of ethanol in the solution?
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Examine the Lewis structure of methylene blue and explain why it is a cation instead of a neutral species. Where would the extra electron otherwise reside
Calculate the mass of propylene glycol (C3H8O2) that must be added to 0.340 kg of water to reduce the vapor pressure by 2.87 torr at 40 Degrees Celcius ( PH2O at 40 Degrees Celcius = 55.3 torr).
In the northern states during winter, "salt" is sprinkled on roads to reduce the formation of ice. What chemical principles are involved in the process?
Question: A bag contains ten counters, of which six are red and four are green. A count is chosen at random; its colour is noted and it is replaced in the bag. A sound counter is then chosen at random. Find the probabilities that:
Ammonia (NH3) decomposes to hydrogen and nitrogen and 22.0 Kcal/ mol of energy absorbed. How much energy is absorbed when 7.69 mol of N2 is formed?
After the reaction, 10.4025 grams of PbI2(s) (molar mass 461.0 grams) were collected. What is the percent yield of the reaction?
The vapor pressure of chloroform is 40.0 torr at -7.1 degree Celsius. Its enthalpy of vaporization is 29.2 kJ/mol. Calculate its normal boiling point.
Compute the partial pressure of Ar(g) that is needed to achieve this. You may assume that delta(vap)H for water is independent of temperature and pressure
Calculate E°cell for the reaction between iodine and magnesium. I2(s) + Mg(s) Mg2+(aq) + 2 I-(aq) Use data from a table of standard reduction potentials as needed. possible answers are
The final temperature was 27.1oC exactly. The specific heat capacity of water is Cp=4.1855 J/g oC. What is the specific heat capacity of the solid?
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