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The decomposition reaction X → products was studied as a function of time. Data are given in the table below.
time / s [X] / mol L-1
0 (exactly) 2.050
7.10×10^2 1.371
1.42×10^3 0.9164
2.13×10^3 0.6127
2.84×10^3 0.4097
What is the value of the rate constant?
Give your answer accurate to three significant figures. Do not give units as part of your answer, but use concentrations in mol L-1and time in seconds.
Calculate the [H ] and pH of a 0.000251 M hydrazoic acid solution. Keep in mind that the Ka of hydrazoic acid is 2.20 × 10-5
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A sample of xenon gas is maintained at 420 torr and 45oC occupies a volume of 420 mL. Determine the mass of the gas. (Molecular mass of xenon = 131.29 g/mol.)
What is the function of a catalyst in a chemical reaction; does the mass of the catalyst change overthe course ofthe reaction?
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.
How many grams of cisplatin are formed from 54.4g of K2PtCl4 and 36.4g of NH3 if the reaction takes place in 95% yield based on the limiting reactant.
How many g of product are actually used when a chemist calculates the theoretical yeild of a product at 20.1 g and the percentage of yeild is 87.1%
Problem- A sample of methane, CH4, gives off 24.9 joules of energy when combusted in the presence of excess O2, according to the equation CH4 + 2 O2 ---> CO2 + 2 H2O delta H = -802.4 kJ What is the mass of methane that was combusted
Problem- The Ka of a monoprotic weak acid is 3.36 x10-3. What is the percent ionization of a 0.101 M solution of this acid?
We performed an extraction using benzoic acid, 2-naphthol and 1,4-dimethoxybenzene. What is the chemical reaction for the protonation of 2-naphthol using NaOH and the reprotonation of 2-naphthol using HCl
If a molecule having an ionization energy of 11.49 eV produces a photoelectron having a kinetic energy of 6.408E-19 J, what is the wavelength of the incident radiation
how does temperature affect the separation of strands in gc content71 verus gc content of 45. which will require a
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