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A solution is prepared from 2.50 g of an unknown compound and 25.0 g of benzene, C6H6. The freezing point of this solution is 4.3 degree celsius. Calculate the molar mass of the compound if given that normal freezing point of C6H6 = 5.5 oC , the freezing point depression constant for C6H6 = -5.12 oC/m .
Why do you suppose that the dehydration of cyclohexanol to cyclohexene has been the tradiotional experiment to illustrate the acid-catalyzed dehydration of an alcohol to an alkene?
Hemoglobin has a positive charge of +5 and a radius of 3.55 nm in water. How far will the protein travel in one hour in an electrophoresis gel at 25C when a field of 1.0 V cm^-1 is applied if the viscosity of the gel is 0.891 cP (1cP = 0.01 g cm^-..
A 357 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 625 mmHg. Calculate the moles of Ar present.
If 3.0g of N2 gas has a volume of 0.50 L and a pressure of 5.0 atm, what is its Kelvin temperature
Determine the value for delta H solution at infinite dilution calculated from the following delta standard H of formation
A 6.50 x 10^-5 M solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15-cm cell at a wavelength of 525 nm.
a 75.0 ml sample of .0500M HCN is titrated with .500 M NaOH. what is the concentration of H+ in the solution after 3.0 ml of .500 M NaOH has been added
A 32.0 g sample of liquid water at 21.0C absorbs 2276 J of heat energy. What will be the final temperature of the water? The specific heat of liquid water is 4.185 J/gC.
Caprylic acid (144.21g/mol), pKa= 4.89, density= 0.910 g/cm3, solubility= 0.068g/100mL, melting point= 16.7 c, boiling point= 239.7 c. What is the pH of a saturated aqueous solution
An empty vial has a mass of 67.77 g. If the vial has a mass of 244.56 g when completely filled with liquid carbon terachloride (d = 1.59 g/cm3), what is the volume of the vial?
The percent by mass of bicarbonate (HCO3-) in a certain Alka-Seltzer product is 32.5 %. Calculate the volume of CO2 generated at 37ºC and 1.00 atm when a person ingests a 3.29g tablet.
A hydrated form of copper sulfate (CuSO4·x H2O) is heated to drive off all the water. If we start with 9.47 g of hydrated salt and have 5.29 g of anhydrous CuSO4
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