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niacin is one of the b vitamins and it acts in solution as a weak acid call it hn if a 200 x 10-2 m of hn is prepared
a solution of nh4cl is prepared and its molarity is 100 x 10-3 what is the ph of this
a 600uc charge is placed at the origin and a second charge is placed on the x-axis at x0300m if the resulting force on
a 001m solution of acid has has a ka16 x 10-10 and a concentration of naas of 129 x 10-3 molar a what is the ph of this
charges of 40 mc and - 60mc are placed at two corners of an equilateral triangle with sides of 010 m at the third
light in air enters a diamond n 242 at an angle of incidence of 48 degrees what is the angle of refraction inside the
will b-myrcene and allo-ocimene structures not form diels-alder adducts with maleic anhydride explain why in each
the real image of an object is located 450cm away from a concave mirror which has a focal length of 100cm how far is
consider the acid hb with a ka58 x 10-10 a what is the kb for the b- ion and b what is the
find the threshold energy that an incident neutron must have when striking an alpha particle to produce a deuterium and
the side rection most often encountered in diels-alder syntheses is dimerization in which the diene also acts as a
a thin film of mgf2 n 138 coats a piece of glass constructive interference is observed for the reflection of light with
a thin lens has a focal length of 1000 cm for red light if the index of refraction for the lens material tends to
a sheet of an unknown material that is 1223 -003 micrometers thick is suspended in air in reflected light there are
a rectangular loop area015m2 turns in a uniform magnetic field with b020t at an instant when the angle between the
how many moles of nabro should be added to 1 l of 0200 m hypobromous hbro acid to obtain a buffer of ph 880 assume no
a straight object of length 19 cm lies along the central axis of a spherical mirror with focal length 72 cm the end
the solubility of alf3 is 67 g alf3 per liter of solution the density of a saturated alf3 solution is 10 gml the ksp of
a 500-turn circular coil with an area of 0050 m2 is mounted on a rotating frame which turns at a rate of 200 rads in
a compound cn is a weak organic base a 350 x 10-2 m solution has a ph 113 calculate the kb for cn the reaction is
a 10-turn square coil of area 0036m2 and a 20-turn circular coil are both placed perpendicular to the same changing
a calculate the h3o of a solution that has an oh- of 0000 0060m is the solution acidic basic or neutral show answer in
the compound ca3po42 has a ksp of 20 x 10-29 if the phosphate ion concentration is adjusted to a value of 25 x 10-2
a coil of 5 turns and area 20 cm2 carries a current of 80a if the coil is in a uniform external field of magnitude of
an electron of energy 400 ev moves at right angles to a uniform magnetic field along an arc of radius 20cm a second