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The first-order decomposition of N2O5 at 338K has a rate constant of 2.70 x 10-3 s-1. If the initial concentration of N2O5 is 2.88M, what is the concentration of N2O5 after 75.0 minutes
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
what is the pH of a buffered sysem made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL
The atmospheric sulfur dioxide concentration over a certain region is 0.12 ppm by volume. Calculate the PH of the rainwater due to this pollutant. Assume the dissolution of SO2 does not affect its pressure.
Suppose 1.00 g of water (saturated liquid) evaporates isobarically at atmospheric pressure of 1.013x10^5 Pa. Its volume in the liquid state is 1.00 cm3 and its volume in the vapour state is 1671 cm3.
What are the likely ground-state electron configurations of the following anions? Se2-, N-3
A chemist added an excess of sodium sulfate to a solution of a soluble barium compound to precipitate all of the barium ion as barium sulfate, BaSO4. How many grams of barium ion are in a 487-mg sample of the barium compound if a solution of the s..
A 0.0560-g quantity of acetic acid is dissolved in enough water to make 50.0 mL of solution. Calculate the concentrations of H+, CH3COO-, and CH3COOH at equilibrium. (Ka for acetic acid = 1.8 x 10^-5).
A particular brand of gasoline has a density of 0.737 rm g/mL at 25 C. How many grams of this gasoline would fill a 15.1 gal tank?
When methanol, CH3OH, is dissolved in water, a nonconducting solution results. When acetic acid, CH3COOH, dissolves in water, the solution is weakly conductiong and acidic in nature. Describe what happens upon solution dissolution in the two cases..
A reaction takes place at a constant pressure of 1.10 atm with an internal energy change of 71.5 kJ and a volume decrease of 13.6 L.
what is the Maximum amount of aspirin possible if salicylic acid is the Limiting Reagent? (2.0013g salicylic acid)(3.09 mL acetic anhydride)(2.142 mass of aspirin synthesized)
Write the oxidation reaction for L-Ribose and α-D-Lyxose (use the Benedict' reagent as an oxidizing agent). Write the reduction rection (hydrogenation) for D-Idose and β-D-Psicoe.
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