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Calculate the pH of a mixture of .25M acetic acid and .1M sodium acetate. The pKa of acetic acid is 4.76.
write the ground state electron configuration( using molecular orbital theory) for o2 and show that it is paramagnetic.
a certain liquid has dH(vap)=26.0kJ/mol. calculate the q,w,dH and dU when 0.50 mol is vaporized at 250K and 750torr
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
What is the ratio of C-14 in a wooden object made in 100 BC to the one made of the same kind of wood in 700 BC? Half life of carbon-14 is 5730 years.
A 25.00mL portion of 0.00923M NaOH (MM 40.00g/mol) was introduced into the solution of H2SO4 (MM 98.08g/mol), then the excess was back titrated with 13.33mL of 0.01007M HCl (MM 36.46g/mol). Calculate the parts per million of sulfur in the sample.
What is the sum of the stoichiometric coefficients when the reaction is balanced to lowest common denominator
heated from 20 to 50 degrees Celsius. How many calories were needed to bring about the temperature change?
A mixture of N2 and O2 gases are in a 2.0L container at 23 degrees C and at a total pressure of 1.00 atm.
How many L. of N2 gas are produced at STP when the airbag inflates if the airbag contains 132 g. of Sodium Nitride?
Describe the intermolecular force that must be overcome in converting the following from a liquid to a gas.
The repeating galacturonic acid monomers are connected by a-(1->4) bonds. Below draw 4 repeating monomer units making up a pectin molecule
There are several reagents that can be used to effect addition to a double bond including: acid and water, oxymercuration-demercuration reagents, and hydroboration-oxidation reagents
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