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The solubility of a compound is 59g per 100ml of boiling methanol and 30g per 100ml of cold methanol, whereas its solubility in water is 7.2g per 100ml at 95°C and 0.22g per 100ml at 2°C. Which solvent would be better for the recrystallization of the compound? Explain.
with vapor pressures at room temperature of 88, 680, 155, respectively, in order of decreasing boiling points.
In the laboratory experiment, as the 4-methylcyclohexene and water are being formed, they are constantly being disstiled from the reaction mixture into a separate receiving flask. Explain how this process helps the reaction proceed with a higher y..
what is the pressure in millimeters of mercury of 0.0105 mol of helium gas with a volume of 220 ml at a temperature of
A mass of 1.37 g of an unknown gas is introduced into an evacuated 1.70 L flask If the pressure in the flask is 0.814 atm at 98 degrees C, which of the following gases might be in the flask?
Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide
the molar heat of combustion of methanol ch3oh is -757kjmol. if 2g of methanol is placed in bomb calorimeter with heat
Concentrated sodium hydroxide (NaOH) is 19.4 M, has a density of 1.54 g/mL, and is a strong electrolyte. What is the molality of 19.4 M NaOH? Assume NaOH(aq) dissociates completely to produce two moles of ions per mol NaOH
How are the atoms, covalent bonds, lone pairs, and electrons pair in a Lewis Structure of PCI3
the cu is drawn into wire whose diameter 2r is 8.50mm if the density of copper is 8.94 gcm 3 then determine how many
A perfume company wants to dispense 19.2 quarts of a new fragrance into small vials. How many 15.0 mL vials can they fill (rounded to the nearest full vial)
Assuming a tank temperature of 16oC, what mass of oxygen is contained in the two tanks?
what is the amount of hydrogen in g in the sample? Vapor pressure of water at 20 degrees celsius is 17.5 torr.
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