How many grams of octane were in the sample
A testing facility found that 8.35*10^23 molecules of carbon dioxide were produced when a sample of octane was burned in air. If this combustion process is known to produce an 86.7% yield, how many grams of octane were in the sample?
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How many grams of oxygen are collected in a reaction where 231 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
A circular drain pipe has a radius of 375 mm. It conveys water (30 ºC) from location 1 to location 2, between which there is a drop in elevation (0.0015 m per m).
If you want to have a water-salt solution that freezes at -10°C, what mass of NaCl must you add to 3.0 kg of water? (Assume the van't Hoff factor, i, for NaCl is 1.85.)
Calculate the wavelength in nm of light (Hz) illuminating a sodium surface if the threshold wavelength of sodium is 544 nm and the kinetic energy of the electron emitted is 3.00 × 10-19 J.
A fluid flowing in a pipe 30cm in diameter has a uniform velocity of 4m/s. The pressure at the center of the pipe is 40KPa, and the elevation of the pipe's centerline above an assumed datum is 4.5m.
Calculate the heat of combustion of ethylene, C2H4. The bond energies are: C H 416 kJ/mol; C C 356 kJ/mol; C C 598 kJ/mol; O O 498 kJ/mol; C O 803 kJ/mol; H O 467 kJ/mol.
What mass of sucrose should be combined with 462 of water to make a solution with an osmotic pressure of 8.30 at 270 ? (Assume the density of the solution to be equal to the density of the solvent.)
To 333 milliliters of a 0.120 molar Pb(NO3)2 solution, 0.667 milliliteres of 0.435 molar KIO3 is added. Calculate the concentrations of Pb+2 and IO3- in the solution at equilibrium.
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