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A dilute aqueous solution of an organic compound soluble inwater is formed by dissolving 2.35 g of the compound in water to form 0.250 L solution. the resulting solution has an osmotic pressure of 0.605 atm at 25 degrees C. Assuming that the organic compound is a nonelectrolyte, what is its molar mass?
There are six samples without label. Write two net ion chemical reactions that you can use to identify each compound
Using the same sample of gas ( P1= 695 , T2 = 27 ), we wish to change the pressure to 6950 with no accompanying change in volume or amount of gas. What temperature T2, in Celsius, is needed to reach this pressure
Given the following balanced reaction, if a mixture of 1.50 mol of Al and 3.00 mol of Cl2 are allowed to react, how many moles of AlCl3 are formed, assuming a 75% yield
A titration of 200.0 mL of 1.00 M H2A was done with 1.10 M NaOH. For the diprotic acid H2A, Ka1 = 2.5 × 10-5, Ka2 = 3.1 × 10-9. Calculate the pH after 600.0 mL of 1.10 M NaOH have been added.
Which condition characterizes the stoichiometric point of any acid/base titration? a) equivalent molar amounts of acid and base have reacted. b) The pH is exactly 7.0 c) The indicator changes from pink to colorless
The precipitate that forms in the qualitative analysis of the chloride ions is AgCl. Calculate the mass of AgCl that should be produced when an excess of AgNO3 is reacted with 0.1900 g of [Co(NH3)5Cl]Cl2.
Explain how the electronic properties of an attached group can affect the rate of electrophilic aromatic substitution and the orientation.
A 250.0-L cylinder contains 65.0% He(g) and 35.0% Kr(g) by mass at 25.0° C and 1.35 atm total pressure. What is the partial pressure of He in this container?
Calculate the (a) weight fraction (b) mol fraction (c) mol percent of each component (d) mass of 5 moles of the mixture.
Nalorphine (C19H21NO3), a relative morphine, is used to combat withdrawl symptoms in narcotics users. How many grams of a 0.0036 molality aqueous solution of nalorphine are needed to obtain a dose of 2.51mg
The vapor pressure of pure CH2Cl2 (with molecular weight 85 g/mol) is 133 torr at 0?C and the vapor pressure of pure CH2Br2 (with molecular weight 174 g/mol) is 11 torr at the same temperature.
SbCl3(s)+H2O(l) -> SbOCl(s)+2HCl(g) In this reaction what is the percentage of Cl in SbOCl and in 2HCl
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