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Two liquids, and , have vapor pressures at a given temperature of 24 and 36 , respectively. We prepare solutions of and at a given temperature and measure the total pressures above the solutions. We obtain the following data:
Solution Amt Amt ()1 1 1 302 2 1 283 1 2 324 1 3 33
The standard molar enthalpy of vaporization for water is 40.79 kJ/mol. What mass of steam is required to release 500. kJ of energy upon condensation? (Molar mass of water is 18.02 g/mol.)
Which antacid product would you expect to be more effective at neutralizing acid on the basis of mass of the active ingredient: tums or milk of magnesia?
A sample of a radioactive substance used in detecting skin cancer produced 592 counts in one minute at the beginning of a test and a count of 451 counts in one minute after one day. If the background counts-per-minute was 48, what is the half-life..
A solution is made my mixing equal masses of methanol, CH4O and ethanol, C2H6O. Determine the mole fraction of each component to at least three significant figures.
if you added 75.0 ml of a 0.555 M solution of NaCl to enough water to produce 950.0 ml of solution, what would be the resulting molarity?
Which has the highest vapor pressure?
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released? (Hint: Use the specific heat equation.) Give your answer in both joules and calories.
You are expected to design a car that works with photovoltaic panels. Assume that the driver is 75kg and the expected speed is 50km/hr.
which one has the larger standard entropy value at 25C(assume thesame molar amount in the comparison) explain the reason why
Honda procduces a hybird electric car called the honda insight has a gas powered engine and a electric motor and a EPA of 70 mile gallon highway. WHat is the inside ratings of kilometers
Using kinetic molecular theiry of gases to explain each of the following: a) A container of nonstick cooking spray explodes when thrown into a fire; b) The air in a hot air balloon rise. c) You can smell the odor of cooking onions from far away.
exhales 30.0 times per minute, that the exhaled air is at a pressure of 1.00 atm, and that the air behaves as an ideal gas. Calculate the time in hours before a fire fighter using such an air tank runs out of air.
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