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A gaseous mixture of NO2 and N2O4 is in equilibrium. If the concentration of NO2 is 8.1*10-4 M what is the concentration of N2O4?
Calculate the pH of a 0.50 M aqueous solution of NH3. The Kb for NH3 is 1.8 x 10-5.
Assume that a particular reaction evolves 231 of heat and that 20 of work is gained by the system. What are the values of delta E and delta H for both the system and the surroundings?
A zero-order reaction has a constant rate of 2.90×10-4 M/rm s. If after 65.0 seconds the concentration has dropped to 9.00×10-2 M, what was the initial concentration.
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture
water can be expressed in polynomial form, vs the number of moles of ethanol (nEtOH), as 1002.93+54.6664*nEthOH-0.36394*nEthOH^2+0.028256*nEtOH^3, the partial molar volume of ethanol has its minimum value at m > 0.004 mol/kg.
How much time is required to produce 200g of alumimun metal for molten aluminum oxide dissolved in cryolite, if you use a 12.0 amp current.
Explain why alcl3 has a molar heat capacity that is approximately 4 times the molar heat capacity of a metallic crystal.
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 8.00 moles of aluminum sulfate Al2(SO4)3 . Express the number of moles of Al, S, and O atoms numerically, separated by commas.
Consider the following isomerization reactions of some simple sugars and values for their standard Gibbs free energy ΔG °:
Find P given that 25 mL of toluene and 25 mL of an aqueous solution containing 0.000330 moles of an organic compound were shaken together and 31 % was extracted into the organic phase.
A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen (by mass). calculate empirical formula.
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