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A solution is made by mixing equal masses of methanol, CH4O, and ethanol, C2H6O. Determine the mole fraction of each component to at least three significant figures.
What mass of CaCl2, when dissolved in 100.00g of water, gives an expected freezing point of -5.0 degrees celcius; CaCl2 is ionic?
Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m-1).
Determine the adiabatic flame temperature (C). Assume product temperatures of 1500K and 3000K, and then linearly interpolate.
An auto mechanic spills 72 mL of 2.6 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 1.5 M NaHCO3 must be poured on the spill to react completely with the sulfuric acid?
at 80 degrees celsius the vapor pressures of pure liquids X,Y and Z are 385, 190,and 66 mm Hg, respectively. What pressure must be exerted on the surface of a solution containing one mole of X, three mole of Y, and two moles of Z for boiling to be..
A compound contains 69.94 percent iron and 30.06 percent oxygen. What is its molecular formula if the molar mass of the compound is 199.55 grams per mole?
If a sample of sodium is dropped into a container of water the reaction is:
The concentration of carbon in a carbon-metal alloy is found to be 4.73x10^1 kg/m3. It is also known that the concentration of carbon in wt% in the alloy is 1.318x10^0 .
Lead(II) sulfide reacts with hydrogen peroxide to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
Calculate the concentration of IO3- in a 3.02 mM Pb(NO3)2 solution saturated with Pb(IO3)2. The Ksp of Pb(IO3)2 is 2.5 × 10-13. Assume that Pb(IO3)2 is a negligible source of Pb2 compared to Pb(NO3)
What is the maximum mass of iron, in grams, that can be obtained from 341 g of iron(III) oxide?
The reaction: 2 HI → H2 + I2, is second order and the rate constant at 800 K is 9.70 × 10-2 M-1 s-1. How long will it take for 8.00 × 10-2 mol/L of HI to decrease to one-fourth of its initial concentration.
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