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Calculate the vapor pressure of a solution containing 27.5 of glycerin in 126 of water at 30.0 . The vapor pressure of pure water at this temperature is 31.8 . Assume that glycerin is not volatile and dissolves molecularly (i.e., it is not ionic) and use a density of 1.00 for the water.
What is the molarity of acetic acid, CH3COOH (MM= 60.0) in vinegar if a 5.00mL sample of vinegar requires 22.50mL of a 0.195M NaOH solution to neutralize it?
predit the products of the reactions of phenylacetaldehyde,c6h5ch2cho,with the following reagents: 1) NaBH4 then H3O+ 2)aqueous acidic CrO3 3)NH2OH 4)CH3MgBr, then H3O+ 5) CH3OH, H+ catalyst
Consider a reservoir with a diameter of 450 m and a depth of 10 m. (a) how many liters of 0.10 M NaF should be added to produce 1.6 ppm F? (b) how many grams of solid NaF could be used instead of the solution used in part (a)
A gaseous compound is 78.14 percent boron and 21 86 percent hydrogen . At 27 degrees celcius, 74.3 ml of gas exerted a pressure of 1.12 atm.
A sample of hydrogen gas was collected over water at 36°C and 855 mm Hg. The volume of the container was 6.50 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 44.6 torr at 36°C)
A protein has been eluted from a DEAE-cellulose column by washing with a salt-containing solution. Before the protein is subjected to a quantification assay,
The combustion of one mole of ethanol (C2H5OH(l)) to produce carbon dioxide and gaseous water has ?Hr = -1235 kJ · mol-1 at 298 K. What is the change in internal energy for this reaction?
At 25 degrees C, the standard enthalpy of formation of KCl(s) is -435.87 kJ/mol. When one moles of KCl(s) is formed by reacting potassium vapor and chlorine gas at 25 degrees C, the standard enthalpy of reaction is -525.86 kJ/mol.
Assume that the maximum number of ATP's is produced (38). At pH 7, and in the presence of excess Mg2+
Which of the following combinations would be the best to buffer an aqueous solution at a pH of 5.0? H3PO4 and H2PO4- (Ka=7.5e-3) HNO2 and NO2 (Ka=(4.5e-4) CH3CO2H and CH3COO (Ka= 1.8e-5) H2PO4 and HPO4 (Ka=6.2e-8)
What volume will carbon dioxide originally 30.0 mL at 27°C have at 77°C
consider the following unbalanced reaction.p4s f2g -gt pf3ghow many grams of f2 are needed to produce 120. g of pf3 if
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