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An organic compound was prepared and purified by chromatography. A conductivity measurement showed the compound to be a nonelectrolyte. Elemental analysis gave an empirical formula of CH3O. A 0.127 g sample of the compound was dissolved in water and diluted to 100.0 mL, and the osmotic pressure of that solution was determined to 0.492 atm at 20°C. Determine the molar mass and molecular formula of the compound. (R = 0.0821 L×atm/K×mol)
Estimate the total calories in a slice of bread that has 9.0 g of carbohydrates, 2.0 g of protein, and 1.0 g of fat. What percentage of total calories is from fat?
For the reaction above, how much would be liberated by the combustion of 5.00g of iron metal in excess oxygen.
A solution is made by dissolving 0.0350 mol of HF in enough water to make 1.00L of solution. At 24°C, the osmotic pressure of the solution is .975 atm.
Typical lab experiment exploring le chateliers principle. HCl is added to Pb(NO3) until precipitate forms. Question asks: Explain why PbCl2 did not precipitate immediately on addition of HCl. What condition must be me by [PB2+] and [cl-] if PbCl2 i..
Identify which of the following statements about the halogenation of alkane hydrocarbons are correct. a) Halogenation of alkanes follows a chain mechanism.
The rate of disappearance of HBr in the gas phase reaction 2HBr (g) → H2 (g) + Br2 (g)
How many grams of potassium nitrate are soluble in 100.0 g of water at 80degrees celcius?
Why does it take significantly stronger magnetic and electric field strengths to move the beam of alpha particles compared with the beam of electrons (beta particles)
A certain flexible balloon contains helium gas at 855L. Initially the balloon was at sea level and the temperature was 25 degrees Celsius with 732 torr.
A water carbonating plant operates by providing carbon dioxide at 5.0 atm. Estimate the molar concentration of CO2 in carbonated water it produces at 25 ºC.
How much heat is associated with the burning of 2.14 g of methane in the following unbalanced reaction
A solid sample containing some Fe 2+ ion weighs 1.062g. It requires 24.12 mL 0.01562 M KMno4 to titrate the Fe2+ in the dissolved sample to a pink end point.
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