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a particular balloon can be stretched to a maximum surface area of 1257 cm2 the balloon is filled with 32l of helium
a what is the osmotic pressure of a solution formed by dissolving 440 mg of aspirin c9h804 in 0357 l of water at 25
the gas-phase decomposition of n2o5 is the first-order process with a rate constant of 150 x 10-3s-1 at 55c the
1 a chemical engineer studying the properties of fuels placed 1500 g of a hydrocarbon in the bomb of a calorimeter and
when all of the products and reactants are gases the type of equilibrium that will be established is aa static
for the reaction of iodine atoms to form i2 the experimental rate law is rate ki2 what are the units for k if the unit
188 w decays by first order with a rate constant of 100 x 10-2 d-1 how long will it take for 93 of the initial amount
a reaction that is second order in one reactant has a rate constant of 40 x 10-2 l x mol-1 s-1 if the initial
the heat of vaporization of freon ccl2f2 is 172 kjmol at 25 c what is the change of entropy for one mole of liquid
consider writing all the possible structural isomers for c7h16 these would fall into which classes listed belowa
bromomethane is converted to methanol in an alkaline solution the reaction is first order in each reactantch3braq
1 compare the program model predicted direction of the dipole moment of nh3 with the predicted direction of the dipole
compare your predicted bond angles and the program model predicted bond angles in so2cl2 with the actual bond angles in
compare your predicted cl-c-cl bond angle and the program model predicted cl-c-cl bond angle in c2cl4 with the actual
2compare your predicted molecular polarity and the dipole moment predicted by alchemy to the actual measured values in
discussion in this exercise you will get practice drawing electron dot structures for organic compounds then you are
consider formic acid hcooh ka 19 x 10-4 and its conjugate base hcoo- with a kb of 53 x
pu-239 nuclear mass of 2390006 amu decays by alpha emission to u-235 nuclear mass of 2349934 calculate how much energy
methane ch4 the major component of natural gas burns in air to form co2 and h2o what mass of water is formed in the
teaspoon of salt weighs about 5g and contains 2300mg of sodium determine the amount of sodium that has been actually
which of the following reactives works for separating metalic ions in an aqueous solution that conatins feno33 and
when nh3 is prepared from 28 g n2 and excess h2 the theoretical yield of nh3 is 34 g when this reaction is carried out
many people have 900 mhz phones where this refers to the frequency of radiation it uses to communicatewhat energy does
if the solution is cloudy after precipitation and heating what does this indicate can the solution be filtered at this
if a 400 mg sample is assumed to be pure nacl calculate the millimeters of 01m agno3 needed to precipitate it