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Rubber balloons filled with helium do not last as long as those filled with nitrogen or air for the reason that the helium leaks out in a day or two through tiny holes in the rubber, while the rate of effusion of nitrogen through the holes is much slower. If a balloon is filled with 48% helium as well as 52% nitrogen (by volume), Explain what is the percentage of He in the gas leaking out through the rubber?
Compare the reactors when 1 reactor is a BSTR with V=10m^3 and the other is a CSTR with V=10m^3 &Q=10m^3/s. Assume Ca(t=0)=Ca0=10mol/m^3. a) Solve for Ca(t) and Xa(t) for the BSTR and the CSTR.
how much silver is plated from a solution of silver nitrate by a 2.00 a current that deposits 0.250 mol of copper from
a saturated solution of barium chloride at 30c contains 150 g water. how much additional barium chloride can be
If you fill the larger tank with oxygen to a pressure of 135 , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
Calculate the following quantity: final volume of a 0.0521M solution prepared by diluting 24.7 ml of a 0.136M lithium carbonate with water
X-ray radiation is associated with transitions in which inner core electrons are being ejected from the atom. Suppose a photon of wavelength 240 pm ejects an electron from the inner shell of an atom and it emerges with a speed of 13.0 Mm s-1.
The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 5.90 mL of a 0.380 M HCl solution to the beaker. How much will the pH change. The pKa of acetic acid is 4.760.
Nitric oxide, sometimes used in the treatment of lung disease in premature children, is provided to the healthcare professionals as a solution of NO in nitrogen.
The heat of vaporization of Freon, CCl2F2, is 17.2 kJ/mol at 25* C. What is the change of entropy for one mole of liquid Freon when it vaporizes at 25*C
What is the composition in mole fractions of a solution of benzene and toluene that has a vapor pressure of 35 torr at 20 °C? Assume the mixture forms an ideal solution.
A gas is placed in a storage tank at a pressure of 20 atm at 20.3 C there is a small metal plug in the tank made of a metal alloy that melts at 125C what is the maximum pressure in the tank?
A liquid boils when its heat of vaporization is the same as its temperature. D. A liquid boils when its evaporation rate becomes constant.
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