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a sample of 46434g of benzoic acid c7h6o2 is dissolved in 500033 g of camphor what is the freezing point of the
the amino acid selenocysteine found in the active site of various enzymes is identical to cysteine except the sulfur
why is the difference in names between hcnhydrogen cyanide and khpotassium
a spacecraft has a nonrelativistic or classical momentum whose magnitude is 14times1014 kgmiddotms the spacecraft moves
a solution is prepared by dissolving 150 g of compound in 250 ml h20 at 25 degrees celsius the boiling point of the
a solid cylindrical disk has a radius of 014 m it is mounted to an axle that is perpendicular to the circular end of
the second-order rate constant for the decomposition of nitrous oxide n2o into a nitrogen molecule and oxygen atom has
water treatment plants commonly use chlorination to destroy bacteria a byproduct is chloroform- chcl3 a suspected
when an ambulance is stationary the siren gives off a sound at a frequency of 500hz in answering the following
1 how many grams of ethylene glycol c2h4oh2 are needed per kilogram of water to protect radiator fluid against freezing
an electron in the n7 level of hydrogen atom relaxes to a lower energy level emitting light of 397 what is the value of
the speed of sound in air is 345 ms a tuning fork vibrates above the open end of a sound resonance tube if sound waves
in an investigation of the reaction between copperii ions cu2 and hydrazine n2h4 in alkaline conditions the following
a hard-boiled egg of mass 530g moves on the end of a spring with force constant 256 nm the egg is released from rest at
as morning sunlight falls on a tethered helium balloon it expands from a volume of 110 cross 103 m3 to a volume of 117
one liter of oxygen combines with 1 l of hydrogen to form 1 l of hydrogen peroxide given that the molecules of hydrogen
an athlete does the 100 m dash if observers on a spaceship moving with a speed of 0741c relative to earth see the
the distance to the moon can be found with the help of mirrors left on the moon by astronauts a pulse of light is sent
at 25degc the vapour pressure of pure pentane is 511 torr and that of hexane is 150 torrwhat is the mole fraction of
a student calculated an averagelue of 4289 for a siyles law constant k based on the number ofgnificant figures in the
a circular coil having 19 turns and a radius of r 192cm carries a current of 330a it is placed in a uniform magnetic
describe a procedure for making 100 ml of a 010 m solution of barium nitrate bano32 make sure to include all equipment
an ideal monotonic gas is compressed at a constant pressure of 09 atm from 14 l to 35 l note atmospheric pressure is
two identical gliders on an air track are held together by a piece of string compressing a spring between the gliders
a copper rod of cross-sectional area 112 cm2 has one end immersed in boiling water and the other in an ice-water