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What are the boiling point and freezing point of a 2.47m solution of naphthalene in benzene?( The boiling point and freezing point of benzene are 80.1 degree celsius and 5.5degree celsius, respecti
An electrical motor is used to operate a Carnot refrigerator with an interior temperature of 0 degrees Celsius. Liquid water at 0 degrees Celsius is placed into the refrigerator and transformed to i
A limestone sample was analyzed for its calcium oxide (CaO) content. A 0.3333 g sample was dissolved in concentrated HCl. The calcium was precipitated by adding an excess of ammonium oxalate and suf
How many liters of the antifreeze ethylene glycol [CH2(OH)CH2(OH)] would you add to a car radiator containing 6.50L of water if the coldest winter temperature in your area is -20 degree celsius?
Liquid mixtures of sodium and potassium are used in some nuclear reactors as coolants that can survive the intense radiation inside reactor cores.
Naturally occurring zirconium exists as five stable isotopes: 90Zr with a mass of 89.905 amu (51.45%); 91Zr with a mass of 90.906 amu (11.22%);
0.266 mol of a solid was dissolved in 300 mL of water at 21.9 oC in a styrofoam cup calorimeter. After the solid had fully dissolved, the final temperature of the solution was 28.8 oC. What is the
How much heat would be needed if the heating is at constant volume? Also how much heat is needed if the heating is at constant pressure?
How much of a 6 M Na2CO3 stick do you need to make 100mL of a 10% Na2CO3 working solution. Describe how you would make the same solution given a bottle of anhydrous sodium carbonate (MW= 105.99g/mol
A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: C 8 H 18 . What is the percentages of carbon and hydro
Explain the fact that acetic acid can be extracted quantitatively from an ether solution by dilute sodium hydroxide solution. write chemical equations for any reactions involved.
The age of any remains from a once-living organism can be determined by radiocarbon dating, a procedure that works by determining the concentration of radioactive 14C in the remains.
One thousand kilograms per hour of a mixture containing equal parts by mass of methanol and water is distilled. Product streams leave the top and the bottom of the distillation column.
The molecular weight of Glycine is 75.07g/mol, and 155.15g/mol for histidine. You want to purify each from a solution that contains both so you load them onto a gel-filtration column.
A ground state H atom absorbs a photon of the wavelength 94.91 nm, and its electron attains a higher energy level.
If instead of using the blue dye, we had used a red dye, what changes would you make in your experimental procedure to determine the rate law for the oxidation of the red dye by sodium hypochlorite
Boiling water at atmospheric pressure is often not enough to kill bacteria. Some bacteria can survive up to 120 degrees C. Sterilization is often performed by pressurizing water to increase its boil
Write a balancedchemical equation that shows the reactionthat occurs when an aqueous solution of BaCl2 reacts with anaqueous solution of Na2SO4 to form aqueous sodium chloride andsolid BaSO4.
Extremely high-purity silicon is required to manufacture semiconductors such as the memory chips found in calculators and computers.
Metabolic activity in the human body releases approximately 1.0 x 10^4 kJ of heat per day. Assuming the body is 50 kg of water, how much would the body temperature rise if it were an isolated system
Calculate the relative and actual surface areas (actual values in m2/g) of soot particles (?=0.6g/mL) having diameters of 20µm and 2µm, respectively, assuming that the particles are sphe
How will doubling the concentration of B while holding A constant affect the value of k (assuming that temperature remains constant)?
Discuss the relationship between the production of nitrogen oxide species and the formation of 'acid rain' and the role played by carbon monoxide, methane, and the hydroxyl radical.
The unit cell in a crystal of diamond belongs to a crystal system different from any we have discussed. The volume of a unit cell of diamond is 0.0454 nm^3 and the density of diamond is 3.52 g/cm^3.
For many material applications, the mass density is an important parameter, particularly in the transportation industry. For understanding interatomic interactions and bonding, the atomic density i