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The electrolysis of water (H20) produces hydrogen (H2) and oxygen (02). In a laboratory experiment, 0.84 g of water is electrolyzed and 3.2 L of gas are collected over water at a pressure of 735 Torr and 25.0 C. What is the vapor pressure (in Torr) of water at 25.0 C?
A solution of NaF is added drop wise to a solution that is .0138 M in Ba2+. When the concentration of F- exceeds M, BaF2 will precipitate. For BaF2 Ksp = 2.7 x 10 ^6
How many moles of monobasic sodium phosphate (NaH2PO4) and dibasic sodium phosphate (Na2HPO4) must be added to water to prepare 0.875 L buffer solution that is 0.50 M phosphate with a pH = 7.1
treatment of ortho-xylene with CH3COCl and AlCl3 followed by hydrolysis gives virtually a single product(one isomer). Treatment of this product with NaOCl in base followed by acidification gives a crystalline solid. Write equations for these react..
A first order reaction has a rate constant of 0.210 at 25 oC and 4.91 at 42 oC. Calculate the value of the activation energy in KILOJOULES
Assuming that none of the intermediates have appreciable concentrations, what are the values of d[C6H12O6]/dt, d[O2]/dt, d[CO2]/dt, and d[H2O]/dt, given that the overall rate is 1.0 x 10-4 mol·L-1s-1. Assume there is an excess of oxygen in the sys..
A 1-L flask is filled with 1.30g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.00 atm. What is the pressure of argon Par in the flask. What is the partial pressure of ethane, Pethane, in the fl..
2 ml of heptane plu 2 ml of alpha pinene give 4 ml of solution. howmany grams per ml are in that mixture? suppose you
One of the allotropes of sulfur is the orthorhombic form, formula of S8 (8 is a subscript), which is a brittle, yellow solid. It does not conduct electricity. This form is stable below 94.5 deg C. It dissolves more in nonpolar solvents.
A solution is .855% HNO3 by mass. Density of the solution is 1.01 g/mL. Find [H+], [OH-], and pH.
How many 325 mg aspirin tablets are needed for a 120 lb. patient if the recommended dose is 6.50 mg of aspirin per Kg of body weight. How many molecules does the patient ingest
a certain first-order reaction has a rate constant of 3.90times10-3 at 45. how many minutes does it take for the
After 77.0 min, 32.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics
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