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Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several gases make up the remaining 1% of air molecules.
An "empty" container is not really empty if it contains air.
Part A: How many moles of Nitrogen are in an "empty" two-liter cola bottle at atmospheric pressure and room temperature (25 degrees Celsius). assume ideal behavior
Part B: How many moles of Oxygen are in an "empty" two-liter cola bottle at atmospheric pressure (1atm) at room tempertature (25 degrees celsius) assume ideal behavior
Write the net ionic reaction from the following balanced reactions: 1. FeCl3 (aq) + K3PO4 (aq) = FePO4 (s) + 3 KCI (aq) 2. Ba(NO3)2 (aq) + Ag2SO4 (aq) = 2 AgNO3(aq) + BaSO4 (s)
ichromate solution is 0.0189 M dichromate, and it took 26.01 mL of your standard iron solution to titrate the excess dichromate in an unknown. What is the chemical oxygen demand of the sample, in units of mg O2/L?
If a laser operated on the n=5 to n=2 transition of a H atom, what wavelength in nm photon would be emitted? (E2= -82 kJ/mol, E1= -328 kJ/mol)
If all the energy obtained by by burning 1.26 lb of butane (fuel value is 10.85 kcal/g) is used to heat 126.0 kg of water at an initial temp of 19.7C, what is the final temperature.
Write the lewis structure for SeF6. What is the general "ABX" structure, shape name, and molecular polarity?
Draw the structure(s) of all of the possible monochloro derivatives of 2,2-dimethylpropane, C5H11Cl. Please Explain.
For each solution, determine the number of moles of HAn and of An- ion at equilibrium. For each solution, caluate the HAn and An- ion molar equilibrium concentrations. Determine the reciprocal of the An- ion concentration for each solution.
Do these lambda maxs indicate an increase or a decrease in the energy of the light absorbed as the number of EN ligands bound to Cu(II) increases
The random walk model used to describe gas diffusion can be treated as a binomial distribution similar to coin flips with a 50/50 chance that a particle will move in either the +x direction or the -x direction.
Consider the cell described below. Al | Al3+ (1.00 M) || Pb2+ (1.00 M) | Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.32 mol/L. (Assume T = 25°C.)
36.8mL of hydrogren gas, from the reaction of a piece of magnesium ribbon with hydrochloric acid, are collected over water in a eudiometer. The temp of the hydrogen gas at 21C, and the atmospheric pressire is 768mmHg.
A buffer system contains .55 M acetic acid and .47 M sodium acetate. What is its pH? The Ka for acetic acid is 1.8x10^-5.
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