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A 258-mL sample of MEK, an industrial solvent is found to have a mass of 0.599 g at 0.988atm and 100°C. Explain what is the molar mass of MEK?
A 5.50 g sample of an unknown is dissolved in 251. g of benzene. The freezing point of the solution is 1.02 C below the normal freezing point of pure benzene.
a robust first grader goes for swimming lessons three times a week and he enjoys it thoroughly. during the first week
Find the theoretical yield and the percent yield if the mass of aluminum is 0.509 and the mass of alum synthesized is 4.99 g
Why is it important to use a minimum volume of hot solvent to dissolve an impure sample during recrystallization and why is it advisable to cool the solution of a mixture slowly during recrystallization
Copper has two naturally occurring isotopes, the predominant one being 63Cu with an isotopic weight of 62.9296 amu and an abundance of 69.150%. What is the mass of its other naturally occurring isotope
what does the absorption spectrum of the ligand ethylenediamine look like in the visible region which you used in this
Steam at 35 bar and 600 K enters a throttling valve that decrease the steam pressure to 7bar. Presuming there is no heat loss from the valve, Define what is the exit temperature of the steam and its change in entropy
How many grams of solid magnesium nitrate should be added to 5.0 g of solid sodium nitrate in a 500-mL volumetric flask in order to produce an aqueous 0.25 M solution of NO3
is submerged in 7.81g of water at 52.5 degrees C in an insulated container. what is the final temperature of both substances at thermal equilibrium.
Phenol (C6H5OH, also called carbolic acid) has a pKa of 9.89. It is used to preserve body tissues and is quite toxic. Calculate the percent ionized in 0.0399 M phenol--a dilute solution.
If the ionization constant of water, Kw, at 40°C is 2.92 x 10-14, then what is the hydronium ion concentration and pH for an acidic solution
Calculate the PH of a 0.015 Solution of carbonic acid, and what is the concentration
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