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Determine an aqueous solution of a polymer that has an average molecular weight of 185,000 amu. Compute the molality that is needed to exert an osmotic pressure of 30 Pa at 37 C.
how many kcal are needed to change 5.00 g of water at 25.0 degrees celsius to steam at 100.0 degrees celsius? the
What volume of a 0.170 M NH4I solution is required to react with 963 mL of a 0.440 M Pb(NO3)2 solution? How many moles of PbI2 are formed from this reaction?
Compute the molar mass of the solid. The molal freezing point constant (Ksubscriptf) for benzene is 5.12 degrees C/m.
The density of the metal is 8.638 g/cm3 and the specific heat of the metal is 0.378 J/g C. If the metal foil absorbs 809.2 J of heat as its temperature changes from 21.20 C to 33.79 C, calculate the thickness of the metal foil in mm.
A 0.040 M solution of a monoprotic acid is 14 percent ionized. Calculate the ionization constant of the acid.
what would the rate constant be at a temperature of 150C for the same reaction described in Part A?
The Haber process is an important reaction for the fixation of nitrogen, nitrogen is converted into ammonia, an important component in the production fertilizers. N2(g) + 3H2 = 2NH3(g) + 22,000cal
a 45-year-old woman is receiving a combined modality treatment for the initial stage of breast cancer. state the two
For the formation of a photchromic imine you use ammonium bromide. Give 2 reasons why you cannot use concentrated HBr.
when 7.50 g of magnesium reacts with 9.50 g hydrochloric acid, hydrogen gas is formed. what is the limiting reagent?
If a non-insulated metal piston is filled with perfect gas at 1 atm of presssure and room temp and the gas is compressed with 10atm, the gas initially heats up and then cools down.
The steam is comes out of the feed water at 200 C. The water at a flow rate of 500 kg/h enters the feed water heater at 20C. Calculate the feed water exit temperature.
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