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A gas mixture with a total pressure of 750 contains each of the following gases at the indicated partial pressures: , 253 ; , 120 ; and , 173 . The mixture also contains helium gas.
What is the partial pressure of the helium gas?
An experiment requires 45.8 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder.
A gas mixture contains helium and oxygen at partial pressures of 255 torr and 0.450 atm.What is the total pressure in mmHg of the mixture after it is placed in a container one-half the volume of the original container? (Temperature remains constan..
A sample of 30.0 ml of krypton gas, Kr, is at 756 mm Hg and 25.0 degree celsius. What is the new volume if the pressure is decreased to 325 mm Hg and the temperature is decreased to -12.5 degree celsius?
Given that the partition coefficient for a solute is K in a water-ether solvent extraction system, is it more effective to do one extraction with V mL of ether or three extractions with V/3 mL of ether
Calculate Q,W and delta U for the conversion of 1 mole of liquid water to steam at T = 100C and P = 1 atm. The heat of vaporization of water is 9720 cal/mol.
Historically, the solid residue that is left after the Dichloromethane -or methylene chloride (CH2Cl2 )solution is evaporated has a lower melting point that its literature value, due to impurities.
if 1.205 g of KHP required 25.25 mL of NaOH solution for complete neutralization, what is the molarity of the NaOH sodium hydroxide solution?
Solid ammonium nitrate (NH4NO3) and solid calcium chloride were placed in water and the mixture was stirred. What is the precipitate?
An aliquot of 14.045 grams of this solution is titrated with 0.1043 M hydrochloric acid (HCl.) and it required hydrochloric acid (HCl solution) of 29.18 mL to reach the methyl red endpoint. Compute the weight % Ammonia (NH3) in the aqueous waste.
The natural abundance of 13C is only 1.1%. Furthermore, its sensitivity in NMR spectroscopy (a measure of the energy difference between a spin aligned with or against an external magnetic field)
For the equilibrium H2+CO2-> Kc= 3.18 at 1106K. If each of the 4 species was initially present at a concentration of 3.000M.
A copper refinery produces a copper ingot weighing 75 kg. the density of the copper is 8.94 g/cm^3. if the copper is drawn into a wire whose dimeter is 8.250mm
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