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How much energy (in kilojoules) is released when 22.5g of ethanol vapor at 97.0 Celsius is cooled to -10.0 Celsius? Ethanol has mp = -114.5 Celsius = 78.4 , = 38.56 and = 4.60 kJ/mol . The molar heat capacity is 113 J/(k.mol) for the liquid and 65.7J/(k. mol) for the vapor?
An ion contains a tin atom and three chlorine atoms. The Cl-Sn-Cl bond angles are less than 109.5 degrees. What is the ion, charge on the ion and hybrid orbitals used by Sn
Determine the empirical formula of estradiol. The molecular weight of estradiol was later determined to be 272. Determine the molecular formula of estradiol.
After emptying the water and drying the flask, it was filled with ethylene glycol. it now weighed 338.72 grams. what is the specific gravity of the ethylene glycol?
A buffer solution was prepared by mixing 25.0 ml of 0.5M sodium acetate with 35.0ml of 0.6M acetic acid. Calculate the pH. The Ka for acetic acid is 1.7x 10^-5
How many grams of ethylene glycol dissolved in 3.55 kg of water needed to lower the freezing point of water to -22.0 c? Kf1.86 c kg/mol
What are the flight times of the singally and doubly-protonated ion forms of a 1735.4 Da peptide accelerated by a potential of 25.00 kV
when 28.6 kg of fe2o3 react with 17.2 kg of co and 6.3 kg of fe are recovered what is the percent yield for the
When CS2(g) (6.437 mol) and 51.91 grams of H2(g) in a 190.0 L reaction vessel at 983.0 K are allowed to come to equilibrium the mixture contains 1.444 mol of CH4(g). What concentration (mol/L) of CS2(g) reacted? CS2(g)+4H2(g) = CH4(g)+2H2S(g)
What is the energy of a photon of green light with a frequency of 5.51 multiplied by 1014 s-1
Look up the molar mass and the density of 2-chloro-2-methylpropane in a reference book such as The Merck Index. Calculate the number of moles of HCl that are produced by complete hydrolysis of 1.0 mL of 2-chloro-2-methylpropane.
When 5.00g of LiCl is added to 100g of water the temperature of the water was found to increase by 9.94*C. Calculate the molar enthalpy of solution for LiCl. Assume the specific heat of the mixture is 4.18 J/g*C.
Draw the skeletal structure for trans-1-ethyl-4-iodocyclohexane. Make sure the tapered end, i.e. the thin end, of the wedge bond is attached to the parent.
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