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Freons are compounds that contain carbon, chlorine, and fluorine in various proportions. They are used as foaming agents, propellants, and refrigeration fluids. Freons are controversial because of the damage they do to the ozone layer in the stratosphere. A 5.87 g sample of a particular freon in a 3.45 L bulb at 25.00°C has a pressure of 262.00 torr. What is the molar mass of this compound? Enter units.
The osomotic pressure of this solution was 10.68 torr at 25 degrees C. What is the molecular mass of the protein?
After filtering off this precipitate, the pH is adjusted to 8 and H2S is again added; no precipitate forms. No precipitate forms upon addition of (NH4)2HPO4. The remaining solution shows a yellow color in a flame test. Based on these observations,..
At this temperature, the vapour pressure of H2O is 31.82 torr. What volume increase is necessary for all of the water to evaporate?
he endpoint of the titration was 9.98mL. Calculate the percent copper in the solid sample.
Calculate the energy for the transition of one mole of electrons from N=10 to the N=7 level in a carbon
When heated, the DNA double helix separates into two random-coil single strands. When cooled, the random coils form the double helix
Ascorbic acid(vitamin c) contains 40.92 percent Carbon, 4.58 percent hydrogen, and 54.50 percent oxygen. What is the empirical formula of ascorbic acid
If a solution containing 30.87 g of mercury(II) chlorate is allowed to react completely with a solution containing 5.102 g of sodium sulfide,
How many grams of O2 are contained in a 25.0 L sample at 5.20 atm and 28.0°C? 2. How many moles of gas are present in a 10.0 liter sample at STP? 3. How many grams are in 10.0 mEq of Ca2+?
when 3.02g NH4Cl solid was dissolved in 20.05 ml water the temperature of the water dropped from 19.8 degrees celcius to 9.1 degrees celcius
calculate the molarconcentration of oxygen in water at 25 celsius for a partialpressure of 0.23 atm. the henry's law constant for oxygen
At 1045K the partial pressures of an equilibrium mixture of H2O (g), H2 (g), and O2 (g) are .040, .0045, and .0030 respectively. Calculate the value of the equilibrium constant Kp at 1045K
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