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explain why sodium hydroxide cannot be used as a primary or secondary standard - ie why the molarity of a sodium
a gas enclosed in a container fitted witha piston ofcross-sectional area 10m2 the pressure of the gas ismaintained at
an airplane propeller is 202 min length from tip to tip with mass 109 kg the propeller is rotating at 2000 revmin about
duplicate 050 g samples of a finely powdered gold ore are digested in an hclhno3 mix and evaporated to dryness each
if an organic chemist nitrated chlorobenzene would the orthopara ratio be less than equal to or greater than the 3862
a 2995g piece of iron and a 2140g piece of gold of 100c were dropped into 820ml of water at 2585c the molar heat
which are closer together the two nuclei within potassium fluoride kf or the two nuclei within molecular fluorine f2
given that the total number of atoms on our planet remains fairly constant how is it ever possible to deplete a natural
one gram of water changes from liquid to solid at a constantpressure of 100 atm and a constant temperature of 0degc in
a reaction of 1-methylcyclopentene with hbr might in principle lead to a mixture of two alkyl bromide addition products
an electric-generator turbine spins at 3400 rpm frictionis so small that it takes the turbine 190 min to coast toa stop
an 800-gram sample of gas was heated from 25c to 225c during the process 346 j of work was done by the system and its
glutamic acid c5h9o4n is used as one of thereagents for a standard to check the bod testdetermine the thod of 150 mgl
when in orbit a communication satellite attracts the earthwith a force of 200 kn and theearth-satellite gravitational
a playground carousel is free to rotate about its center onfrictionless bearings and air resistance is negligable
in a circus performance a monkey is strapped to a sled andboth are given an initial speed of 30ms up a 180deg inclined
how many grams of ice at -66 c can be completely converted to liquid at 105 c if the available heat for this process is
an empty cast-iron pot that has a mass of 210 lb and is filled with 185 l of water calculate a the energy in joules
an 780 n box is pulled210 m up a 30deg incline by anapplied force of 101 n that pointsupward parallel to the incline if
aspirin acetylsalicylic acid c9h8o4 is a weak monoprotic acid to determine its acid-dissociation constant a student
a cord is wrapped around the rim of a wheel 0310 m in radius and a steady pull of370 n is exerted on the cord thewheel
the equilibrium constant for the reaction n23h2lt--gt 2nh3 is kp43410-3 at 300 c pure nh3 is placed in a 100-l flask
a solid cylindrical disk has a radius of 015 m it is mountedto an axle that is perperndicular to the circular end of
an 80 g piece of gold at 650 k is dropped into 100 g of h2o l at 298 k in an insulated container at 1 bar pressure
fraunhofar double slit diffraction pattern is observed onthe focal plane of a lens of focal length 05mwavelength