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Water's relatively high specific heat (4.184 J/g°C) makesit an ideal coolant for automobile engines. How much heat from anengine would be absorbed if 12.6 kg ofcooling system water were heated
When using an anion exchange HPLC column in a purification proceedure the column was eluted by a linear gradient of NaCl. What does the linear gradient of NaCl accomplish in this proceedure?
If a reactant is used up according to a first order rate equation, and the initial concentration of the reactatant is 3.2 mol/L, what is the concentration of the reactant after two half-lives have
Taking the mass of the atmosphere to be 5.3E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 190ppm by volume (inmetric t
Anthracene is a hydrocarbon obtained from coal (and as such its structure resembles a small fragment of graphite). The empirical formula of anthracene is C7H5. To find its molecular formula you diss
A .15 g sample of a purified protein is dissolved in water to give 2 mL of solution. The osmotic pressure was found to be 18.6 torr at 25 degrees Celsius. Calculate the molecular weight of the prot
A fluorocarbon, CF4, has a critical temperature of-45.7oC, a critical pressure of 37atm, and a normal boiling pint of -128oC. Are there any conditions under which this compound can be a liquid at ro
Two identical swimmin pools are filled with uniform spheres of ice packed as closely as possible. The spheres in the first pool are the size of grains of sand; those in the second pool are the size
If a reactant is used up according to a first order rate equation, and the initial concentration of the reactant is 3.2 mol/L, what is the concentration of the reactant after two half-lives have pas
Earth's oceans have an average depth of 3800 m, a total area of 3.63E8 km^2, and an average concentration of dissolved gold of5.8E-9 g/L.
Assume that an average household in Southern California uses 0.5acre-foot of water per year, and that the cost of a kWh ofelectricity is $0.19. Calculate the annual cost of pumping water to the aver
Why is it not possible for asalt with the formula M3X to have a face centered cubic lattice ofX anions with M cations in octahedrals holes.
What is the average kinetic energy of a Helium atom at 300 K? What is the averagekinetic energy of an Argon atom at 300 K?
Aliquots of a 0.5 mg/ml standard of BSA are used to construct a standard curve for the bradford protein assay. The tubes contains the following amounts of the BSA solution: 0,20,40,60,80, and 100&mu
The pka of heppes is 7.55 at 20 c and its mw is 238.31. Calculate the amounts of heppes in grams and of 0.1M NaOH in ml that would be needed to make 300 ls of 0.2M heppes buffer at pH of 7.2.
A 150.0 g sample of a metal at 75.0°C isadded to 150.0 g of H2O at 15.0°C. The temperatureof the water rises to 18.4°C.Calculate the specific heat capacity of the metal, assuming thatall
Can someone explain in detail how to do all the steps for thisproblem?Ascorbic acid is a compound consisting of three elements: C,H, and O. When a 0.214g sample is burned in oxygen, 0.320g ofCO2and
Antimony dissolves in hot concentrated sulfuric acid,H2SO4, or nitric acid, HNO3, toform solutions containing Sb(III). The sulfuric acid reactionproduces sulfur(IV) dioxide gas. What are the balance
A certain substance, melting at 188-189 ºC, is suspected to be4-aminobenzoic acid. How could you be reasonably certain that the substance is actually 4-aminobenzoic acid and not another compou
The structure of manganese fluoride can be described as a simplecubic array of manganese ions with fluoride ions at the center ofeach edge of the cubic unit cell.
You want a solution of ethylene glycol, C2H4(OH)2, that has a glycol mole fraction of 0.125. How many grams of the glycol should you combine with 950 grams of H2O? What is the molality of the solut
If you want to prepare a solution that is .0512 molal in K2CO3, how many grams of the salt would you have to add to 250 g of H2O? What is the mole fraction of K2CO3 in the solution?
If 100.0 mL of 1.00 M NaOH and 100.0 mL of 0.500 M H2SO4solutions are mixed, what will the concentration of the resulting solution be?
.5 mL of bromobutane (MW= 137, density= 1.27 g/mL) was caused to react with excess sodium ethoxide (MW= 68.1) to afford ethoxy butane.
Consider a mixture of air and gasoline vaporin a cylinder with a piston. The original volumeis 30.cm3. If the combustion of this mixture releases 1081. J of energy, to what volume will the gases exp