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A water desalination plant is set up near a salt marsh containing water that is 0.10 M NaCl. Calculate the minimum pressure that must be applied at 20.C to purify the water by reserve osmosis.
Anthraquinone contains only carbon, hydrogen, and oxygen and has an empirical formula of C2H4O.The freezing point of camphor is lowered by 22.3C when 1.32g anthraquinone is disolved in 11.4g camphor
A 2.00 g sample of a large biomolecule was dissoled in 15.0 gof carbon tetrachloride. The boiling point of thissolution was determined be 77.85C .
The diameter of a certain atomic nucleus is 1.70x 10-5pm and its mass is 5.80 x 10-25 g. What is the densityof the nucleus in grams per centimeter cubed ?
The reaction A+2B -> products has the rate law, rate = k[A][B]^3. If the concentration of B is dobled while that of A is unchanged, by what factor will the rate of reaction increase?
When 100.0 mL water at an unknown temperature is mixed with 50.0mL water at 10 degrees celsius, the final temperature is 30 degrees celsius.
It takes 42 min for the concentration of a reactant in a first order reaction to drop from 0.45 M to 0.32 M at 25 degrees C. How long will it take for the reaction to be 90% complete?
The activation energy for the isomerization ol cyclopropane topropene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 260 to 286oC?
Ammonium nitrate decomposes to form dinitrogen oxide andwater. What mass of ammonium nitrate must react to form 33gdinitrogen oxide?
A solid stainless steel cylindrical rod has a 1.5 inchdiameter. The density of stainless steel is 7.70 g/cm^3. If a metalworker needs a 2.00 kg piece of stainless steel, how long a section must he c
A compressed gas cylinder contains 1 x 103 g of argongas. The pressure inside the cylinder is 1961 psi (pounds persquare inch) at temperatiour of 19oC.
Sodium hydroxide solution is usually standardized by titrating apure sample of potassium hydrogen phthalate (KHP), an acid with oneacidic hydrogen and a molar mass of 204.22 g.
Acetylacetone (acac) forms a trisacetylacetonateiron (III) complex(ie. Fe (acac)3) in aqueous solution. A 5 mlaliquot of acetylacetone stock solution is diluted to 200ml with aniron (III) chloride sol
The absorption of a solution that contains chromium (III) ionsshows two maxima, one at about 400nm and the other at about575nm
When making a stock solution of ASA, 0.3053 g of ASA were mixedwith 100ml of H2O, with a concentration of 0.0169M, sixsolutions were diluted from the stock to these percentages of the initial concentr
The effusion rate of the compound as a gas was measured andfound to be 24.6 mL/min. The effusion rate of argon gas, underidentical conditions, is 26.4 mL/min.What is the molecular formula of the com
Comound Y has a solubility of 5.0 g/100 mL in water and250.g/100 mL in ether. What weight of compound Ywould be removed from a solution of 3.0 g of Y in 100 mL of waterby a single extraction with 10
A volume of 4.10ml neutralized a solution of 1.2 grams of0.1mol*L-1 sodium hyroxide and 300ml H20,calculate the number of moles of acid that reacted in the neutralization reaction.
What is the equation for the reaction between hydrochloric acid and sodium hydroxide when conduction an acid-based titration of a 300ml solution of 1.2g sodium hydroxide of about 0.1 mol *L-1 w
A compound dissolves in water and is thought to beionic. If 6.15 x 10-3 moles of the compound is dissolved in water to give a solution of 50.0 mL, the osmotic pressure of the solution is 8.22 a
A compound made up of C, H, and Cl contains 55.0 percent Cl bymass. If 9.00 g of the compound contain 4.19 * 10^23 H atoms, what is the empirical formula of the compound?
Boron is curious in that it forms molecules that do not obey the octet rule. One such compound is BH3. When reacted with a noble gas electronic configuration is formed.
A gas has a Henry's law constant of 0.150 M/atm. How much water would be needed to completely dissolve 1.49 L of the gas at apressure of 720 torr and temp of 14 C.
A reaction is followed and found to have a rate constant of 3.36 x104 M-1s-1 at 344 K and a rateconstant of 7.69 M-1 s-1 at 219 K. Determine the activation energy for this reaction
If the concentration of carbonic acid (H2CO3) in the blood is0.0024 M, and the pH is 7.4, what is the concentration of bicarbonate ion (HCO3-)? Assume an equilibrium constant of4.2x10-7 for the diss