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What is the freezing point of a solution prepared by dissolving 39g of benzene (C6H6) in 500g of cyclohexane. Fp for cyclohexane is 6.6 C Kf=20.0 C/m.
the limiting current of lead in an unknown solutions is 5.60mua. one ml of a 1.00 x 10-3m lead solution is added to
What is the reducing agent and what has been reduced? What quantity of iodine can be obtained if 20.0g of NaI is mixed with 10.0g of MnO2 ( and a stoichiometric excess of sulfuric acid)
Consider a galvanic cell consisting of a magnesium electrode in contact with 1.0 M Mg(NO3)2 and a cadmium electrode in contact with 1.0 M Cd(NO3)2. Calculate Eo for the cell and draw a diagram showing the cathode, anode
For the complete neutralization reactions between the following pairs of acid and bases, which pair is a soluble, strong base and a weak acid that react to form an insoluble salt?
A 100g sample of water at 27oC is poured into a 76.2g sample of water at 89oC. What will be the final temperature.
what rate is heat released/absorbed (express in kW and state whether released or absorbed) when 4050 mol/h of liquid water are produced
How much heat is evolved in converting 1.00 mol of steam at 145°C to ice at -50.0°C? The heat capacity of steam is 2.01J/g?°C and of ice is 2.09J/g?°C.
you have a buffer system made up of equimolar amount of carbonic acid,H2CO3, and sodium bicarbonate,NaHCO3. Write equations to show how this buffer behaves when (a) HCL is added and (b) NaOH is added.
For H3PO3, Ka1 = 1.0x10- 2and Ka2 = 2.6x10-7. Calculate a value for the [H2PO3] in a 0.500 molar solution of H3PO3
What component of air will bring about this reaction and what is its approximate concentration in air? If you had a stoppered flask with basic luminol and then opened it to the air
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25. Suppose that 1.15 of rubbing alcohol evaporates from a 65.0 aluminum block.
Stearic acid is an unsaturated fatty acid b.the short hand notation for fatty acid that is 20 carbons long with one double bond at carbon 5 can be written as 20:1(delta5)
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