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CH4 methane boils at -160C, NH3 ammonia boils at -33C, H2O boils at 100C, H2S hydrogen sulfide boils at -60C
a) Explain the increasing boiling point as you move from methane to ammonia to water be explicit as to what forces are acting on these molecules and how you know.
b) We've learned that elements in the same column tend to behave similarly but H2S boils at lower temperatures than H2O and even NH3 explain this in terms of intermolecular forces
Ethylene glycol, C2H6O2 (MW=62.1mol) has a density of 40.0 mass percentage and a solution of ethylene glycol in water is 1.0514 g/mL at 20 EC. Calculate the molality of the solution
What is the dissolution reaction for each of the ionic solids below. Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.
what is the volume of a sample of chlorine gas with a density of 0.0032 gcm3 and a mass of 1.45
uranium is first converted to UF6, which is easily vaperized RT. The mixtture of 235UF6 and 238 UF6 gases is then subjected to many stages of effusion. Calculate how much more 235UF6 effuse than 238UF6. 235UF6 to UF6 238. 4 decimal.
Draw a mechanism to demonstrate how pyridine catalyzes the hydrolysis of acetic anhydride to two molecule of acetic acid. Is this reaction reversible? why or why not?
Germanium forms a substitutional solid solution with silicon. Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 4.43 × 1021 Ge atoms per cubic centimeter
The free radical chlorination of isobutane at 25C yields 64% isobutyl chloride and 36% tert-butyl chloride. However, free radical bromination of the same compound at 127C yields only trace amounts of isobutyl bromide and 99% of tert-butyl bromide
What is the mole fraction of solute and the molal concentration for an aqueous solution
Three isotopes of argon occur in nature - 36Ar, 38Ar, 40Ar. Calculate the average atomic mass of argon to two decimal places, given the following relative atomic masses and the abundances of each of the isotopes: argon
Compare the relative greenness of this approach to at least one other extraction method: steam distillation or solvent extraction. List the green chemistry principles that differentiate the two approaches that you compare
prepare 3.9L of a HCN/NaCN buffer that has a pH of 9.70 and an osmotic pressure of 1.27atm at 298K. What masses of HCN and NaCN should you use to prepare the buffer
The international unit for weighing diamonds and determine the volume of a 0.76 carat diamond if The density of diamond is given=3.51 g/cm3 ?express your answer in units of cm3
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