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calculate the molecular mass of a solute with 8.02 grams of solute in 861 grams of water lower the freezing point to -.430 degree Celsius.
Calculate the minimum volume in litres of aqueous sodium hypochlorite solution 12.5%, 12.5g/100ml that would be needed to convert all of the cyanide residues in a gold mine's oxidation pond into the s
When the bag was removed, the ice had melted and the liquid water had a temperature of 17.0 deg C. How many kilojoules of heat were absorbed?
A solution was prepared by mixing 50.00 mL of 0.190 M HNO3 and 124.00 mL of 0.150 M HNO3. Calculate the molarity of the final solution of nitric acid.
Calculate the number of grams of aluminum required to prepare 500.0g of chromium metal.
There are 2.2 mg of lead in exactly 500 g of a water sample. What would the concentration of lead be in parts per million?
When formic acid is heated it decomposes to hydrogen and carbon dioxide in a first order decay calculate the partial pressure of formic acid if the intial pressure at time 0 equal 220 torr
The Temperature of the gas was 291.2799 K before expansion and 293.9809 K afterwards. What is the change in Enthalpy with respect to pressure at constant temperature,(δH/δp)T for this ga
What would happen to the average kinetic energy of the molecules of a gas sample if the temperature of the sample increased from 20 degrees celcius to 40 degrees celcius.
What is the major product of the reaction between methanol and (2R,3S)-2-bromo-3-methylpentane at room temperature
Write the full electronic configuration for Sr, He, Zn, Br and for each of the following elements indicate which set of orbitals is being filled last (# of sublevel & s,p,d,f) for chemical symb
An aqueous solution that contains 285ppm of potassium nitrate (KNO3) is being used to feed plants in a garden. What volume of this solution is needed to prepare 1.7 L of a solution that is 97 ppm in
Calculate the final temperature of 36 {rm mL} of ethanol initially at 16^circ {rm C} upon absorption of 750 {rm J} of heat. (density of ethanol =0.789 {rm g}/{rm mL})
If the pressure is lowered to 1.00 atmosphere and the temperature is raised to 400 K, the volume of the gas sample would be?
The heat of fusion of water is 6.008x10^3 J/mol at its normal melting point of 272.15K. Calculate the freezing point depression constant Kf.
A flask containing 352 ml of gaseous nitrogen is collected over water at a temperature of 22 degree Celsius. the total pressure of the gases was 742 mm Hg. how many grams of nitrogen were collected?
A gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures: , 257 ; , 114 ; and , 177 . The mixture also contains helium gas. What is the par
What is the ground-state electron configuration of Co3+?
Ammonia and hydrazine are both compounds of nitrogen and hydrogen.Based on the law of multiple proportions, how many grams of hydrogen would you expect 3.47 of nitrogen to combine with to yield amm
Because of the slightly solubility, 0.59mg/L. of Ba3(PO4)2 all of the Ba2- and (PO4)3- do not precipitate from solution. How many milligrams and moles of Ba3(PO4)2 dissolve in 200mL of solution?
What metals give rise to the best plasmons? why?Why are plasmonic better than electronics for comptational processes?Why is it difficult to couple to a plasmon?
Calculate the mass percent of a solution in which 176 of is dissolved in 3.08 of water at 25 (density = 0.997 ).
Calculate the theoretical yield of C2H5CI when 125g of C2H6react with 255 g of CI2, assuming that C2H6 and CI2 reactonly form C2H5CI and HCI.
Calculate the freezing point depression, the ratio of the vapor pressure above the solution to that of the pure solvent, and the molecular weight of the solute, Pbenzene=103 Torr at 298K.
What is the density of a block of marble that occupies 253 cm3 and has a mass of 752 g?