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In the molecular structure of maleic acid and fumaric acid there are four H atoms. However, the compounds are diprotic and only dissociate two of the H atoms. In these compounds, which H atoms can be dissociated in water? Why are the other two H atoms not able to dissociate in water?
Determine the molar mass of the acid and given that the pH at the half way point to the equivalence is 3.86. Calculate the Ka of the unknown acid.
Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from the n=5 state to the n=3 state
a 100.0 ml sample of acetic acid solution of unknown molarity is titrated with 0.15 m naoh solution. the titration
A weak acid (HA) has a pKa of 4.999. If a solution of this acid has a pH of 4.459, what percentage of the acid is not ionized
During the isomerization of trans-1,2-dibenzoylethylene C16H12O2 using 95% Ethanol C2H6O , and UV light irradiation. What is the overall equation for this reaction. What is the product.
Which of the following reactions will have the greatest rate at 298 K. Assume the frequency factor A is the same for all reactions. EXPLAIN YOUR ANSWER. No credit given if no explanation.
calcium hydride cah2 reacts with water to form hydrogen gas.cah2s 2 h2ol caoh2aq 2 h2gthis reaction is sometimes used
A sample of a gas originally at 29°C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11°C.
Consider formic acid, HCOOH (Ka= 1.9 x 10^-4) and its conjugate base, HCOO^- with a Kb of 5.3 x 10^-11.
why is the identity of an element determined by the number of protons in its nucleus? why cant the identity be
The explosive, TNT, is composed of 37.0% carbon, 2.2% hydrogen, 18.5% nitrogen and the rest oxygen. if the molar mass of TNT is 227 g/mol, what is the empirical and molecular formula for TNT?
A mixture of 25.0 g of Mg and 25 g of B203 are allowed to react to completion. Identify the masses of MgO and B that are formed and determine the masses of any left -over reactants
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