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2 when 276 g 00200 mol of k2co3 was mixed with 300 ml of approximately 2m hcl the temperature rose by 52degca write a
a 200 kg crate sits at rest at the bottom of a 129 m long ramp that is inclined at 33 degrees above the horizontal a
suppose the first stage of a two-stage rocket has total mass 130times104 kg of which 110times104 kg is fuel the total
explain why c-h single bond stretching is observed in the functional group higher energy region of the ir but the
a neutral amino acid has a pka1 of 40 and a pka2 of 100 what is the ph of the solution of this amino acid if 80 is in
what is the ph of a buffer system in which the relevant pka is 50 and there is an acidbase ration of
the keq of a biochemical reaction is 190 calculate the standard free energy change associated with this reaction r1987
a point source of light is submerged 22m below the surface of a lake and emits rays in all directions on the surface of
express the work of isothermal reversible expansion of a van der waals gas in reduced variables and find a definition
the drawing shows a coin resting on the bottom of a beaker filled with an unknown liquid a ray of light from the coin
a cannonball is shot from a cannon on a cliff at a height of 124 m at a ship on the ocean the cannonball is shot with
a 12475 g sample of a kcio3 - kci mixture is strongly heated all of the kci3 in the mixture undergoes decomposition the
a large cold 120 c block of iron is immersed in a tub of hot 997c water in the first 100s 100 kcal of heat are
the dilution of the buffer should not change the ph of the buffer by very much explain why
the thought process was for the synthesis given for m nitro toluene in the solutions for 24 d where they add the och3
the light goes through a second polarizer and exits with an intensity of 225 wm squared what is the orientation angle
a plane wall is constructed of a material having a thermal conductivity that varies with the square of the temperature
an lc circuit has zero resistance no battery a capacitor c70microfarads and an inductor l06h connected in a simple loop
an aqueous solution of ki has a freezing point of -195 c and an osmotic pressure of 250 atm at 25 c assumong that ki
an old wooden tool is found to contain only 24 of 14 6c that a sample of fresh wood would how old is the
rumor has it that a photographic camera on a spy satellite can read the license plate of an automobile on the ground to
a certain superinsulation material having a thermal conductivity of 2 x 10-4 wm c is used to insulate a tank of liquid
a projectile launcher has a muzzle velocity of 15ms and is aimed 60 degree above the horizontal the projectile
if one attempts to methylate benzene completely with ch3clalcl3 the product contains a greenish solid of the formula
the solubility products of pbso4 and srso4 are 63e-7 and 32e-7 respectively what are the values of so42- pb2 and sr2