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A first-order reaction had a rate constant , k , of 0.0123 1/s. If the initial concentration of reactant is 1.25M , what will be the concentration of reactant after 10 minutes?
How many grams of aluminum must be used to produce 5.00 grams of hydrogen gas?
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
NaCl(aq) + H2O(l) → NaOH(aq) + Cl2(g) + H2(g). If the brine contains 389 g of NaCl, how much Cl2 can be produced.
Calculate the heat of enthalpy for the reaction: PCl5(g) → PCl3(g) + Cl2(g)
What is the half-life of a compound if 78 percent of a given sample of the compound decomposes in 45 min? Assume first-order kinetics.
Provide the name of the major alkene product that results when (2S,3S)-2-bromo-3-methylpentane is treated with sodium methoxide in
A bicycle tire is filled with air to a pressure of 95.0 psi at a temperature of 19 degrees celcius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius. The volume of the tire increases by 4.0%. What..
A sample of pure NO2 is heated to 334 degree C at which temperature it partially dissociates according to the equation 2NO2(g)-->2NO(g)+O2(g)
Calculate the molality of a solution prepared by dissolving 112. grams of copper (II) sulfate in 450. mL of water at 25 oC
An aqueous solution contains 12.5% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 118 torr.
Solid sodium peroxide (Na2O2) reacts with liquid water yielding aqueous sodium hydroxide and oxygen gas. How much heat is released
Calculate the change in entropy of the system and the surroundings and the total entropy change if four moles of an ideal gas is expanded isothermally
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