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What is the osmotic pressure at 22 C of an aqueous solution that contains 4.35 g of urea (NH2CONH2) dissolved in 100 ml of solution?
In the reaction 2 C8H18 + 25 O2 ? 16 CO2 + 18 H2O, if the rate of change in the concentration of CO2, ?[CO2]/?t, equals 0.51M/s, what is the value of ?[O2]/?t, the rate of change in the concentration of O2
The density of a gaseous compound was found to be 1.23 g L-1 at 330 K and 25.5 kPa. What is the molar mass of the compound?
Explain the fact that even though dibenzoylmethane is not a methyl ketone it gives a positive iodoform test
A solution is prepared by mixing 0.3355 mol of NaNO3 (84.995 g mol-1) with 235.0 g of water (18.015 g mol-1). Its density is 1.0733 g mL-1. What is the molality of the solution?
How much heat must be absorbed by the six pack to lower its temperature from 25.0C to 5.0C?
The property you can observe macroscopically is the fration of black and white balls on either side. What happens when you pull out the barrier in the middle and why
Identify the subshell in which electrons with the quantum number n = 5, l = 4 are found. (Just write A,B, C, D, or E on the answer sheet) a) 5d b) 5p c) 5g d) 5f e) 4f
How many grams of sodium bicarbonate and sodium carbonate, respectively, are needed to make 3 liters of 0.075 M buffer, pH 10.500
calculate the pressure change needed to completely hydrogenate this substance at room temperature and 50 degrees celcius.
Hydrogen cyanide (and organic nitriles, which contain the cyano group) can be catalytically reduced with hydrogen to form amines
Calculate the boiling point (in degrees C) of a solution made by dissolving 1.73 g of naphthalene {C10H8} in 67.1 g of benzene. The Kbp of the solvent is 2.53 K/m and the normal boiling point is 80.1 degrees C.
List the predominant species in Fe(NH4)2(SO4)2 6H2O solution. What is the net ionic equation for formation of iron (II) oxalate via the reaction of potassium oxalate and Fe(NH4)2(SO4)2 6H2O
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