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The concentration of ammonia in a solution is 0.10M. What is the concentration of hydroxide ion in the solution? The Kb of ammonia (NH3) is 1.8 x 10 -5
a)1.8 x 10-5M
b)1.34 x 10-3M
c)4.2 x 10-4M
d)4.2 x 10-3M
e)1.8 x 10-6 M
Calculate: (a) The partial pressure of each component. (b) The mass fraction of methane. (c) The average molecular weight of the gas mixture. (d) The density of the gas mixture in kg/ m3. write the steps please
Calculate the ionic strength of a solution that is made .1222 M AgNO3, plus .0215 M MgCl2, plus .140 M AlCl3
A first order decomposition reaction is observed to have the following rate constants at the indicated temperatures. using an Arrhenious plot, find the activation energy
the difference between E and Z formations for organic molecules and how to establish priority according to the Cahn-Ingold-Prelog rules.
The combustion of one mole of benzene, C6H6, in oxygen releases 3268 kJ of heat. The products of the reaction are carbon dioxide and water.
calculate the expected change in temperature for 4.5 g of NH4NO3 dissolved in 100.0 mL of H20. Assume that the calorimeter absorbs no heat. (ie. Ccal=0)
Write a suitable mechanism for the cleavage of butyl isopropyl ether with HI at 100 degrees C to form exclusively isopropyl alcohol and 1-iodobutane. Explain why butyl alcohol and 2-iodo-isopropane are not formed in this reaction.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 67.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Describe the preparation of 0.250 L of 50.0 mM lactate buffer, pH 4.5 using a 0.5 M solution of lactic acid and 0.5 M solution of sodium lactate. pka=3.9
what starting material are needed to prepare the following compound using malonic ester synthesis
The activation energy of a certain reaction is 77.3 kj/mol. How many times faster will the reaction occur at 41 degrees celcius than at 0 degrees celcius?
The activation energy for the diffusion of car- bon in chromium is 111,000 J/mol. Calculate the diffusion coefficient at 1100 K (827??C), given that D at 1400 K (1127??C) is 6.25 ?? 10??11 m2/s.
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