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How much energy must be removed from a 125 g sample of benzene (molar mass=78.11g/mol) at 425.0 k to liquify the sample and lower them temperature to 335.0 k?
change of hvap =33.9 kj.mol\change of hfus = 9.8 kj/molcliq = 1.73 J/g x *ccgas = 1.06 J/g x *ccsol = 1.51 J/g x *ct melting = 279.0 kt boiling = 353.0 k
If the copper is drawn into wire whose diameter is 7.50 , how many feet of copper can be obtained from the ingot? The density of copper is 8.94
Calculating percent purity from a reaction, One of the reactions that occurs in a blast furnace, where iron ore is converted to cast iron is Fe2O3 + CO = Fe + CO2.
We are asked to write the balanced equation when glucose is reacted with ammonium chloride + epichlorohydrin + isopropyl alcohol. What is the ultimate end product? Hopefully it is supposed to be some form of a quaternary ammonium radical attached to ..
Tyrosine was loaded onto an anion-exchange column and completely washed with a pH 6.5 buffer. Which amino acid came off the column first? A) Arg B) Lys C) Tyr D) His E) None, all would be retained on the column at pH 6.5
when silver ions are added to the red fescn2 ions the red solution disappeared and a white precipitate of agscn formed.
Hydroiodic acid reduces chlorine to hydrochloric acid and iodine. Enter a balanced net ionic equation for the reaction.
a sample of gas with an initial volume of 33.0 l at a pressure of 765 mmhg and a temperature of 325 k is compressed to
Calculate the molar density at this pressure at 310. What fraction of the gas phase molecules initially present for 1.0 in the chamber are present at
A wine-dispensing system uses argon canisters to pressurize and preserve wine in the bottle. An argon canister for the system has a volume of 29.1mL and contains 36.6g of argon.Assuming ideal gas behavior
Calculate the concentration of C6H5NH3+ in this buffer solution b) Calculate the pH after 4.0 g of NaOH(s) is added to 1.0 L of this solution (neglect volume changes)
At 0.0oC, if the volume of air is 2.6 mL and the pressure of the atmosphere that day is 815 mmHg, what is the number of moles of air?
200 mL sample of lake water is contaminated with a single monoprotic acid. titrating this sample with a .005 M NaOH required 7.3 mL of the NaOH solution to reach the endpoint. what is the concentration of H in the lake
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