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A sample of hydrogen gas (H2) has a volume of 5.0 L and a pressure of 1.0 atm. What is the new pressure, in atmospheres, if its volume decreases to 2.0 L with no change in temperature or amount of gas?
The acid-dissociation constant for hypochlorous acid (HClO) is 3.0 X 10-8 . Calculate the concentrations of H3O+, ClO-, and HClO at equilibrium if the initial concentration of HClO is 0.0090 M.
A 32.50-mg sample of naturally occurring elemental silicon was irradiated with neutrons in a nuclear reactor at a flux density of 2.75E-13 thermal neutrons per (cm^2 sec). The activity of 31-Si was determined at a remote site with a beta parti..
some species below react with fe2+ and some do not. for each that does write the equation with products for those that don't write no reaction -na (s) -na+ (aq) -co (s) -co2+ (aq) -h+ (aq)
After 74.0 min, 35.0% of a compound has decomposed. Explain what is the half-life of this reaction assuming first-order kinetics
Acid rain with a pH as low as 1.5 has been recorded in West Virginia. What is the H3O+ concentration in this acid rain and how many grams of HNO3 must be dissolved to make 25L of solution that has a pH of 1.5
A mixture of ethyl iodide (C2H5I, bp 72.3 degree Centigrade) and water boils at 63.7 degree centigrade. What weight of ehtyl iodide would be carried over by 1gm of steam during steam distillation
A sample of H2SO4 contains 1.11 grams of H (1.01 g/mol). How many moles of H2SO4 (98.02 g/mol) are present?
determin the rate for the reaction. (B) how long would it take for 25% of the reactant to decompose?
Aspirini has a density of 1.40 g/cm^3 what is the volume (in cubic centimeters) of an aspirin tablet weighing 2.8x10^2mg
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7 kJ/mol.
What is the solubility of MnS, in grams per liter, in a buffer solution that is 0.115M HC2H3O2 - 0.505 M NaC2H3O2? For MnS, Kspa=3x10^7.
what is the vapor pressure of a 45.0 solution of glucosec6h12o6 at 90oc giventhat the vapor pressure of pure water at
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