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given a stationary phase of silica gel and nonpolar and polar analyte which would elute first also if given a polar
a very large tank contains the gas ethane the pressure of ethaneis 214 x 104 pa thereare 428 moles of this gas in
a 50-gram ice cube at -30 degrees celcius is heated until 45 grams has become water at 100 degrees celcius and 50 grams
a carboxylic acid can exist in two conformations e and z that are different by the dihedral angle around the c-o bond
a string 2m long is fixed at both ends it is found that standingwaves can be set up in this string for frequencies of
how many grams of sodium formate nacho2 would have to be dissolved in 14 l of 042 m formic acid pka 374 to make the
what advantages does liquid chromatography have over tlc and what advantages does liquid chromatography
a turnable platter has a radius of 0150 m and is rotating at349 rads when the power is shut off the platter slows down
what is the ph of a solution prepared by mixing exactly 561 ml of 0200 m hc2h3o2 with 149 ml of 0400 m koh ka for
a spherical balloon is made from a material whose massis 300 kg the thickness of thematerial is negligible compared to
in thin layer chromatography tlc what does the rf retention factor value represent what is a large rf value telling us
a a stars temperature is 5649 kaccording to the stefan-boltzmann law how much energy is radiatedinto space per second
a cube floats in waterthe length of each side 8 cm the cube is 34 submergeda find the volume of the water displacedb
a c-h bond absorbs at 2950 cm-1 replacing the 12c with 14c has a smaller effect on the position than replacing the 1h
write four equations showing structures for the reactions used in this experiment to separate and recover
what is the angular momentum of a 0210 kg ball rotating on the endof a thin string in a circle of radius 110 m at an
a bicycle being repaired is turned upside down and one wheel isrotated at a rate of 60 rpm if the wheel slows uniformly
a cylinder with a moveable piston holds 380mol of argon at a constant temperature of 295 k as the gas iscompressed
a 420-m column has a height equivalent to a theoretical plate of 070 mm if the flow rate is 325 mlmiddotmin-1 calculate
a 020-m-long metal rod has a radius of 10 cm and a resistance of32 x 10-5 omega what is the resistivity of the
what two properties of gold make it possible to find gold but not metals like copper silver lead and aluminum by
a cube floats in water the length of each side 8 cm thecube is 34 submergeda find the volume of the water displacedb
an automobile moves at constant speed over the crest of ahill the driver moves in a vertical circle of radius 20 m at
a microscope has an objective lens with a focal length of 1622 mmand an eyepiece with a focal length of 900 mm with the
a manufacturer orders 16000 kg of copper ingots what volume does the copper