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A sample of propane,C3H8, contains 10.8 moles of carbon atoms. How many total moles of atoms does the sample contain?
A student determines the molar mass of methanol. She found that the equilibrium temperature of a mixture of ice and pure water was 0.4 degrees C on her thermometer
a sample of Ringer's solution contains the following concentractions (mEq/L) of cations: Na 147, K 4 and Ca2 4. If CI- is the only anion in the solution,
A gas mixture contains 76% nitrogen and 24% oxygen. If the total pressure is 1.16 atm what are the partial pressures of each component
the hydrated radius of hemoglobin is found to be 3.55 nm. How many water molecules hydrate a hemoglobin molecule?
The standard reduction potiental for the reduction of Eu+3 to Eu+2 is -.43 volts... list atleast 3 substances capable of reducing Eu+3 to Eu+2
The water is brought to the vapor state at 300 degrees celsius and 1,500 kPa, where its internal energy is 2,784.4 kJ/kg and its specific volume is 169.7 cm3/g. Calculate delta U and delta H for the process.
At 250C, the equilibrium constant Kp for the reaction PCl5(g) PCl3(g) + Cl2(g) is 1.80. Sufficient PCl5 is put into a reaction vessel to give an initial pressure of 2.74 atm at 250C. Calculate the pressure of PCl5 after the system has reached equi..
With respect to the Cooper pair model, explain why increasing temperature reduces the effectiveness of low-temperature superconductors
The half-life of plutonium-239 is 24,100 years. How long will it take for a 100 g sample of plutonium to be reduced to 25 g?
The specific 14C activity of a sample of charcoal is determined to be 12.47 dpm g-1of carbon. What is the age of the sample if the initial activity of 14C in this sample was 13.56 dpm g-1of carbon?
A 1-L flask is filled with 1.45 g of argon at 25^0C. A sample of ethane vapor is added to the same flask until the total pressure is 1.25 atm.what is the partial pressure of argon in the flask?
For the series of spectral lines of atomic hydrogen with n1 = 3, which of the following wavelengths does not correspond to a wavelength predicted by the Rydberg equation? Rydberg equation: 1/? = (1.097 x 107 m-1) x (1/n12 - 1/n22) ----- A. 1875 nm..
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