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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 .
How many grams of sodium lactate should be added to 1.00L of 0.150 M lactic acid to form a buffer solution with pH = 4.10? Assume that no volume change occurs when the sodium lactate is added.
A typical aspirin tablet contains 324mg of aspirin (aceytlsalicyclic), a momoprotic acid having Ka= 3.0*10^-4. If you dissolve 4 aspirin tablets in a 300ml glass of water, what is the pH of the sol
A triprotic acid, H3A, has three ionization constants of Ka1= 8.7x10^-3, Ka2= 1.9x10^-8, and Ka3=8.6x10^-13 for the steps respectively. the following reaction represents the reactions that would tak
A sample of sulfuric acid contains 2.11 g of hydrogen, 32.21 g of sulfur, and 63.63 g of oxygen. How many grams of sulfur and grams of oxygen are present in a second sample of sulfuric acid, contai
Ionization energy involves completely removing an electron from an atom. What wavelength of light is required to remove an electron from the n=5 excited state of a hydrogen atom?
The lattice energy of CsF is -744 kJ/mol, whereas that of BaO is -3029 kJ/mol. Explain the large difference in lattice energy. *Hint: use Columb's Law to show the approximate difference in magnitude
Consider the solubility of the slightly soluble salt A(OH)2 are allowed to equilibrate, one at 25 degrees Celsius and the other at 80 degrees Celsius. A 15.00 mL aliquot of each solution is titrated
Calculate the formal charge on the indicated atom in each of the following molecules or ions. Some molecules may have more than one possible resonance structure, each resulting in a different possib
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.498
Assume you have one hydrogen molecule in a 1.00 L flask at room temperature. Calculate the average energy of the H2 molecule (= 3/2kT) and assume this is the energy level of the particle in a cubic
If the total pressure in the container is 5.00 atm, what are the partial pressures for each of the three gases remaining at the end of the reaction?
The brewing industry uses yeast microorganisms to convert the glucose (C6H12O6). to ethanol (C2H5OH) for wine and beer. The baking industry uses the carbon dioxide produced to make bread rise:
You have a 25kD histidine tagged bacterial protein (100% pure).You apply this pure protein to a Ni2+-agarose column. Then you apply crude mouse cell extract to the column.
The heat capacity for a bomb calorimeter is 10.30KJ/degreeC.Calculate the heat of combustion of one gram of almond susing the following experimental data:
If 0.145g of this metal carbonate reacts completely with.125L of HCl(aq) with a pH of 1.56, what is the identity of the metal in this carbonate?
A piece of metal of mass 12 g at 107 ?C is placed in a calorimeter containing 55.7 g of water at 20?C. The final temperature of the mixture is 27.6?C. What is the specific heat capacity of the meta
When a 2.3L sample of hydrogen gas at 25oCis heated to 120oC at constant pressure, what is the new volume of the gas? What is the pressure of a sample of 35g of nitrogen gas in a5.6L container at 90oC
What is the value of delta G at 727oC at727oC.(b) In what direction will a net change occur ifone brings together 0.0500mol CO2,0.0700molH2, 0.0400mol CO, and 0.0850 mol H2O?
You dissolve 0.1 mol of ammonium nitrate in 100 ML of H2O.The temperature of the solution changes from 22C to 15C. Thespecificheat capacity for water is 4.184 J/g.K.
A certain metal oxide has the formula MO. When 39.46 grams of MO reacts with excess hydrogen gas according to the reaction shown below, 31.70 g of pure M is obtained.
If a divalent metal ion is inserted in the center of theporphine ring, tis charge will exactly balance the two negative charges of the dianion.
How many milligrams of MgI2 must be added to 250.0 mL of 0.0876M KI to produce a solution with [I-]=0.1000 M? Note that this assumes no volume change upon addition, probably not abad assumpution for
Fe + 2HCl = FeCl2 + H2 A piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. The reaction formed hydrogen gas and iron chloride. How many grams of HCl were consumed?
The heat of fusion of ice, ΔH fusion,is = 6.01 kj/mol. What mass of ice can be meltedwith the same quantity of heat as required to raise the temperture of 3.50 mol H2O by 50.00 degrees C?