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Biphenyl C12H10 is a nonvolatile nonionizing solute that is soluble in benzene C6H6. At 25 °C the vapor pressure of pure benzene is 100.84 torr. Explain what is the vapor pressure of a solution made from dissolving 16.3 g of biphenyl in 32.4 g of benzene?
An aqueous CaCl2 solution has a vapor pressure of 80.8 mmHg at 50C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent
18.0 mL of HCl was required to titrate 10.0 mL of a 10.0% by mass NaOH solution (density=1.1 g/mL). What is the concentration of NaOH solution
Why does tellurium have an endothermic electron affinity. In other words, why would it take energy to add an electron to it
Which is the best solvent for recrystallizing acetanilide, water or dichloromethane (CH2Cl2)? Explain your answer to receive lifesaver rating.
a 0.4512 g sample of a primary-standard-grade na2co3 required 36.44 ml of a h2so4 solution to reach the end point of
A solution of 53.6 g of glycerin in 133.7g of ethanol has a vapor pressure of 113 torr at 313K. Calculate the vapor pressure of pure ethanol assuming that glycerin is a non-volatile, non electrolyte solute in ethanol.
If 16.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
State a cylinder with a piston contains a sample of gas at 25ocelsius. Explain the pistons move in response to changing pressure inside the cylinder. By what gas temperature would the piston move so that the volume inside the cylinder doubled. Exp..
Calculate the pH of an aqueous solution prepared to contain 1.3 x 10^-3 M sodium nitrite (NaNO2) if the acid dissociation equilibrium constant, Ka, for nitrous acid (HNO2) is 5.1 x 10^-4.
If the partial pressures of CO2 and H2O in exhaled air are each 27.0 torr at 30.6°C, calculate the masses of CO2 and of H2O exhaled in 1.00 hour of sleep.
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of two particles per second. How many years would it take to count 6.25 x 10^23 particles
The following reaction is first order with respect to NO and first order with respect to O2, and the rate constant is 5.0 x 104 M-1s-1
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