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A mixture of gases contains 5.00 grams of Ne, 5.00 grams of O2, and 5.00 grams of CO2. What is the mole fraction of each gas? What fraction of the total pressure of the gas mix is due to each gas? If the gases are in a 25.0 L container at 25°C, what is the total pressure?
if a room has a volume of 127m3 then calculate its volume a in km3? b in dm3? c in cm3?a suspension of an infant
in the experiment ligroin may be used as a solvent for the separation of the product from biphenyl.a. what is
How much heat is required to warm 225 g of ice from -44.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
The mass of a cube of iron is 324 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Suppose that in changing samples, a portion of the water in the calorimeter weere lost. In what way, if any, would this change the heat capacity of the calorimeter?
A stock solution is prepared by adding 24 mL of 0.4 M Na3PO4 to enough water to make 76 mL. What is the PO43- concentration of 25 mL of the stock solution
On the obtained mass-spectra you got in the expected parent-ion mass region two adjacent lines with almost the same abundance
If 1.28 g of NaOCl is required for an experiment, but only NaOCl*5H2O is available in the lab, how many grams of the hydrate should be used?
Give the reaction products of sodium borohydride (followed by acidification) with the following compounds. a) acetone
During the distillation of a mixture of two miscible liquids with very different boiling points, the temperature rises to a constant reading and then drops off before returning to a higher reading. Explain the likely cause of this fluctuation in t..
An organic compound X contains C, H, and O. A 16.69 g sample of X underwent combustion analysis, leading to the production of 44.71 g CO2 and 10.99 g H2O. What is the emperical formula of the compound?
One a cold day a person takes a breath of 450 ml of air at a pressure of 745 mm Hg and room temperature of 21oC. What is the volume of this air in the lungs at 37oC and 758 mm Hg?
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