Determine the numbers of molecules remain un-reacted
Starting with 1.00 ´ 10 20molecules of reactant at time t = 0, a first-order reaction has a half-life of 20.0 minutes. Determine the numbers of molecules remain un-reacted after the 100.0 minutes?
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A thermos is a container with vacuum among its inner and outer walls. Describe why removing air among the walls reduces the heat exchange between the contents of the thermos and surroundings.
In what two ways might the presence of significant amounts of benzoic acid impurity be harmful to the benzoic condensation if the Benzaldehyde is easily oxidized to benzoic acid by oxygen in the air?
Estimate the first-order rate constant for its decay, in units of years -1 when the Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years.
Discuss how long will it take the concentration of A to drop from the 0.75 M to0.25 M when the rate constant for the reaction 3A ® 4B is 6.00 ´10 -3 L mol -1min -1.
Explain how do you separate impurities from the solid you are purifying in an ideal solvent in each of these situations
If this energy is derived from the combustion of methane (CH4) at standard conditions (25oC and 1 atm), the heat of combustion of methane is 889.967 kJ/mol and the density of methane is 0.0680kg/m3.
f its column is 450 mL and its contents have a pH of 2, determine the numbers of mold of H does it contain? Suppose that all the H+ come from the HCL, determine the numbers of grams of sodium hydrogen carbonate will totally neutralize the stomach
Write down a stepwise equation for these reactions when the triphenylmethanol can also be prepared from the reaction of ethyl benzoate with phenyl magnesium bromide and by the reaction of diethyl carbonate (C2H5Odouble bonded to a COC2H5) with ph
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