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100 mole of an ideal gas cvm1247 j mol-1 k-1 is initially at 300 k and in 10 l and is expanded to 20 l in two different
a certain atom has atomic number z 20 and atomic mass number a 42a what is the approximate radius of the nucleus of
predict all possible products formed via free radical monochlorination of 3-methylpentane calculate the relative
calculate the ph of a solution resulting from the titration of 50ml of 0078m hcl with 25 ml of 0083m naoh give your
a merry-go-round starts from rest and reaches the angular speed of 4 rpm in the first two minutes what would be the
calculate the ph of a buffer solution made by mixing 342 g of sodium acetate into 1 l of a 009 m solution of acetic
a 400-microf capacitor that is initially uncharged is connected in series with a 790-k ohm resistor and an emf source
a solution of a weak acid was tested with the indicators used in this experiment the colors observed were violet orange
a 225-mw laser beam of diameter 198 mm is reflected at normal incidence by a perfectly reflecting mirror calculate the
calculate the ph of a buffer solution made by mixing 44 ml of a 006 m ammonia solution with 60 ml of a 010 m ammonium
suppose a spacecraft of mass 28000kg is accelerated to 025ca how much kinetic energy would it haveb if you used the
decide whether or not a reavtion will occur when a solution of cadmium ii chloride is treated with nitric acid hno3aq
decide whether or not a reaction will occur when a solution of cadmium ii chloride is treated with nitric acid hno3 aq
you have a concave spherical mirror with a 133-cm radius of curvature you place an object on the mirrors axis 197 cm in
state whether the following reactions are spontaneous or non spontaneous at low temperature high temperature or all
a future geosynchronous space station will be used to collect solar energy the energy is transmitted back to earth as
gaseous oxides of nitrogen rarely occur as pure substanced but as equilibrium mixtures of them one of these equilibrium
an object 140 cm high is held 300 cm from a persons cornea and its reflected image is measured to be 0167 cm highwhat
a sample of a radioactive substance used in detecting skin cancer produced 592 counts in one minute at the beginning of
a potters wheel a solid uniform disk of mass 60kg and radius 25cm spins about its central axis with an angular speed of
gas chromatographic analysis of a mixture of organic compounds gc-fid gave the following results hexane 27 heptane 16
why are the solubility characteristics of the sodium benzoate in a solution of aqueous base such as sodium hydroxide
how can a known value for kd for a pair of extracting solvents be used to estimate the efficiency of a liquid-liquid
what words could be used to describe the chemical process that is summarized in each reaction belowa carboxylic acid in
what common structural features or functional groups allow benzoic acid to physically distribute itself between the two