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what ratio ch3nh3ch3nh2 is needed to prepare a buffer solution with a ph of 860 from methylamine ch3nh2 and
how much commercial fresh concentrated h2so4 solution in ml would you have to add to 100ml of distilled water to make a
a person pulls a 5 kg sled by a rope across nearly frictionless ice the rope and therefore the force is oriented 40
compare and contrast solid-phase dna synthesis with enzyme-catalyzed dna synthesis please separately describe the
two canoes are tied together and traveling down a river with the current spotting a waterfall the two canoeists cut the
you place 25 moles of a monomer in a flask it equilibrates to form a dimer by the following reaction the molar
what is the ph of 0185m sodium phenolate c6h5ona the sodium salt of phenol ka 10 x
find the ph during the titration of 2000ml of 01000m triethylmine kb52x10-4 with 01000m hcl solution after the addition
a person having a mass of 591 kg stands before a flight of 30 stairs each of which is 25 cm high he runs 20 stairs
2na 2h2o ----gt 2naoh h2 if 72g of na undergoes reaction with water and the resulting hydrogen is bruned in oxygen
youre an optometrist mounting a projector at the back of your 42-m-long exam room 26m above the floor it shines an
a gas is compressed from an initial volume of 560 to a final volume of 123 by an external pressure of 100 during the
a transverse sinusoidal wave on a string has a period t 360 ms and travels in the negative x direction with a speed of
light of wavelength 530 nm is incident normally on a diffraction grating two adjacent maxima occur at angles given by
a laser produces a cylindrical beam of light of wavelength 400nm the average energy in a 2m length of the beam is
a 679 g mixture of the compounds sodium sulfide and potassium bromide is 409 by mass sodium sulfide the compound
the standard entropy of pbs at 29815k is 6480 jk-1 mol-1 assume that the heat capacity of pbs is given by cpm
during the experiment of an acid catalyzed dehydration of a secondary alcohol an elimination reaction e1 is experienced
1 find the fourier transform of the function exp-pix2 sigma2 explain how the width and height of the bands are
210 l of a buffer solution that is 0360 m in nh3 and 0430 m in nh4cl are diluted to 430 l with distilled water what is
a cube of ice is taken from the freezer at -8oc and placed in a 110 g aluminum calorimeter filled with 300 g of water
a student following the procedure in this experiment prepared three solutions by adding 1150 2300 and 3450 ml of a 760
a voltaic cell is constructed by immersing a strip of silver metal in a 10m agno3 solution and a strip of cadmium metal
a solution is prepared by mixing 79 ml of 500m hcl and 240 ml of 800m hno3 water is then added until the final volume
an archers bow is drawn at its midpoint until the tension in the string is 107 times the force exerted by the archer