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a 2500 ml sample of a 1028 m monoprotic weak acid solution has a ph of 348 after the addition of 1245 ml of 1106m naoh
what is the solubility in m of pbcl2 in a 015 m solution of hcl the ksp of pbcl2 is 16 x
an electric trimmer blade has rotational inertia 185times10-4 kgm2a what torque is needed to accelerate this blade from
a 115 m long ramp is inclined at 19 degrees to the horizontal a solid ball is released from rest at the top of the
a 250-ml sample of 0150 m hydrazoic acid is titrated with a 0150 m naoh solution what is the ph after 133 ml of base is
the star sirius is a distance of 8 light-years from the earth if sirius suddenly stopped shining how much longer would
a revolving door consists of four rectangular glass slabswith the long end of each attached to a pole that acts as the
the acid-dissociation constants of sulfurous acid heso3 are k a1 17 x 10-2 and k a2 64 x 10-8 at 250 degc calculate
a charged capacitor is connected to an inductor to form an lc circuit with a frequency of oscillation f 16 hz at time
a solution contains 200mmol hf dissolved in 100ml h2o this solution is titrated at 25oc with 0100m naoh
an object of mass 68 kg is attached to a spring of force constant 1830 nm the object is set into simple harmonic
a child on a swing-set swings back and forth if the length of the supporting cables for the swing is 28 m what is the
one liter of a buffer solution is made by mixing exactly 500 ml of 1000 m acetic acid and 500 ml of 0500 m calcium
what volumes of 01000m acetic acid and 01000m sodium hydroxide should be mixed to prepare 1000l of a buffer solution of
a speedy tortoise can run with a velocity of 10 cms and a hare can run 20 times as fast in a race they both start at
draw the structure of diacetylferrocene comment on the distribution of the two acetyl groups over the two aromatic
a car originally traveling at 30 ms manages to brake for 5 seconds while traveling 125 m down hill at that point the
determine the empirical formula and the molecular formula of a compound that has the compostion of 800 c and 200 h the
starting from rest a car travels 1350 m in 1 minute it accelerated at 1 ms2 untill it reached its cruising speed then
the electric field strength just outside the outer conductor of a coaxial cable of outer radius of 02cm is e7200nc
at 1000 k the equilibrium constant for the reaction br2 g 2 br g is 28 x 104 pressure is in atmospheres what does g
one particle has a mass of 400 10-3 kg and a charge of 9 microc a second particle has a mass of 700 10-3 kg and the
the equilibrium constant kp for the reaction n2o4 g 2 no2 g is 0142 at 298 k what is g for the
if the enthalpy of vaporization of ch2cl2 is 290 kj mole-1 at 250 oc and the entropy of vaporization is 925 j mole-1
for the decomposition of caco3 s into cao s and co2 g at 1 atm estimate the minimum temperature at which you would