Calculate what is the molar mass of the solute
Pure benzene has a normal freezing point of 5.5°C. a solution containing 11.4g of a molecular substance dissolved in 150.0g of benzene (Kf=5.12°C/m) has a freezing point of 1.20°C. what is the molar mass of the solute?
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In an experiment, 99.0 g of aluminum (with a specific heat of 900 J/kg·K) at 93.0°C is mixed with 88.0 g of water (with a specific heat of 4186 J/kg·K) at 32.0°C, with the mixture thermally isolated.
Aniline (C6H5NH2, Kb = 4.3 x 10^-10) is a weak base used in the manufacture of dyes. Calculate the value of Kn for neautralization of aniline by vitamin C (ascorbic acid, C6H8O6, Ka = 8.0 x 10^-5). Does much aniline remain at equilibrium?
How could you separate zinc chloride and zinc sulfide? Napthalene sublimes easily, but potassium bromide does not. How could you separate these two substances?
A mixture of A and B is found to obey Raoult's Law. At 60 degrees celcius the vapor pressure of pure A is 400 mm HG and that of pure B is 650 mm HG. Find the composition of the vapor phase above a solution of 35.0 mol % A in B at 60 degrees celciu
Natural gas is a mixture of hydrocarbons, primarily methane (CH4) and ethane (C2H6). A typical mitxture might have Xmethane=0.915 and Xethane=0.085. What are the partial presssures of the two gases in a 15.00-L container of natural gas at 20. C a
What is m4, the mass flow rate of water from the dryer? What is m1, the mass flow rate of aqueous FeSO4 solution entering the crystallizer?
1 L of a buffer composed of acetic acid and sodium acetate has a pH of 4.3. Adding 10mL of 2M sodium hydroxide solution to 100mL of this buffer causes the pH to rise to 4.78.
A certain ideal gas has molar heat capacity at constant volume Cv. A sample of this gas initially occupies a volume Vo at pressure Po and absolute temperate To. The gas expands isobarically to a volume 2Vo then expands further adiabaticallly to a
A voltaic cell is constructed by immersing a strip of silver in a 1.0M AgNO3 solution and a strip of cadmiun metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. Write the balanced half-reactio
In a student experiment, the empirical formula of a copper halide was found by adding aluminum metal to an aqueous solution of the halide, displacing copper metal.
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