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describe why benzoic acid and 4-nitroaniline must be air dried for such a long time or placed in an oven before taking a final mass and finding the melting point
A foul smelling gas produced by the reaction of HCl with Na2S was collected, and 1.00 L sample was found to have a mass of 1.52 g at STP. What is the molecular mass of the gas. What is its likely formula
rate constant for the decomposition of N2O5 to NO2 and O2 at 70 degree celsius is 6.82 x 10^-3 s-1. Suppose we start with 0.300 mol of N2O5(g) in a .500L container. What is the half-life of N2O5 at 70 degrees celsius?
determine whether a solid forms when solutions containing the following salts are mixed. if so write the net ionic equation for the reaction. a)Na3PO4(aq) and AgNO3(aq). b)K2SO4(aq) and Na2CO3(aq). c)Pb(NO3)2(aq) and Na2CO3(aq). d)BaCl2(aq) and KO..
calculate the total volume of hydrogen gas which would be collected at 760 mm Hg and 25 degrees celsius. Will a second gas be present in the sample collected by water displacement
what is the limiting reagent and the volume of CO2 formed when 11 L s2 reacts with 18 L O2 to produce Co2 gas adn SO2 gas at STP
Classify each orbital diagram for ground-state electron configurations by the rule or principle it violates
Calculate the number of moles of CH3N=NCH3 that have reacted in a 1.00 L flask 0.0500 min after 4.00 g of CH3N=NCH3 is introduced. The molar mass of azomethane is 58.0824 g/mol.
The mass spectrum of 1-ethyl-1-methylcyclohexane shows many fragments, with two in very large abundance. One appears at m/z = 111 and the other appears at m/z = 97.
If an enzyme-catalyzed reaction proceeds at 25% maximal velocity at 5 mM substrate concentration, calculate the Km of the enzyme.
Calculate the pH during the titration of 29 mL of 0.2 M HNO3(aq) with 0.15 M NaOH after 10 mL of the base
if 9.0L of NO are reacted with excess O2 at STP, what is the volume in liters of the NO2 produced?
What is the atom economy of this process if aspirin is considered to be the desired product. Enter your answer as a percentage, to the nearest tenth of a percent.
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