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when a 700 g sample of rbbr is dissolved in water in a calorimeter that has total heat capacity of 3565 kjk-1 the
draw a mechanism showing electron flow with curvy arrows that includes all steps and intermediates going from starting
trimethylamine ch33n reacts readily wdiborane b2h6 the diborane dissociates to two bh3 fragments which can react
explain why baco3 is soluble in aqueous hcl but baso4 which is used to make the intestines visible in x-ray photographs
a buffer is prepared by adding 420g nah2po4 to 10 l of solution that is 10m napo4 assuming no volume change whats the
as a side reaction of benaldehyde with al in 5m naoh would ethyl acetate keep it from contaminating the hydrobenzoin
identify how precitipation reactions can be used in the water treatment and purification processes to help maintain a
use a solubility table to predict which of the following combinations of ions would produce a precipitate for the
if 213 ml of a 0120m naoh solution are required to neutralize 0400 grams of an unknown monoprotic acid what is the
how many grams are present in 1 gram of potassium-40 its natural abundance is 00117 and its half life is 128x109
suppose a 400 l nickel reaction container filled with 00090 m h2 is connected to a 500 l container filled with 0296 m
a gaseous fuel mixture stored at 748 mmhg and 298 k contains only methane ch4 and propane c3 h8 when 112 l of this fuel
briefly explain why precipitates are usually rinsed with distilled water before they are tested
a hemoglobin molecule can bind up to four oxygen moleculesin a certain experiment a 0085l solution containing 6g of
draw the skeletal structure of cyanohydrin that is formed when 2-butanone reacts with the cyanide ion in the presence
write the ground state configurations of c2 and f2 and then predict which molecule should have the greater bond
the predominant intermolecular forces in hydrocarbons are dispersion forces there are two factors that increase the
methyl acetate ch3cooch3 reacts in basic solution to form the acetate ion ch3coo- and methanol ch3oh assuming the
london dispersion forces are weak intermolecular forces that work to attract both polar and nonpolar molecules to one
an electron in a hydrogen atom goes through a change in energy level from n4 to n2 calculate the wavelength of the
what is the ph at the point during a titration when 21 ml of 0200 m hcl has been added to 26 ml of 00500 m nh3 solution
show that the ratio of the surface area to the volume of the sphere is smaller than that for a cube of equal
1 a 02088g sample of an unknown monprotic acid requires 2210 ml of 01000 moll koh to reach the end point what is the
calculate the ph for each of the following cases in the titration of 500 ml of 0140 m hclo aq with 0140 koh aqa after
how many grams of magnesium fluoride mgf2 must be added to 673 g of water to prepare a 481 mm solution of magnesium