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phenol commonly known as a carboxilic acid was used by josheph lister as an antiseptic for surgery in 1865 its
two copper blocks each of mass 100kg initially have differenttemperatures 20 degree celsius and 28 degree celsius the
a carnot engine operates between reservoirs whose temperatures are650k and 350k to improve the efficiency of the engine
what is the name of the product that results when 4-methylcyclohexane is treated with 2 ethnolic pbp
a buckyball is a molecule consisting of 60 carbon atoms arranged ina soccer ball like shape its has an atomic weight of
two forces are acting on an object force 1 has a magnitude of330 n pointing due north force 2 has a magnitude of 881
a gas mixture is composed of 00856 mol of ne and 00254 mol kr what is the mass percent of kr in this
an ultraviolet lamp emits light of wavelength 400nm at the rate of400w an infrared lamp emits light of wavelength 700nm
a hockey player hits a punk so that it comes to rest in 9s after sliding 30 m on the ice determine a the initial
an experimenter arranges to trigger two flash bulbs simultaneouslyproducing a big flash located at the origin of his
a20 kg wagon is pulled along the level ground by a rope inclined at30 degrees above the horizontal a friction force of
a 900 kg car is going 20 ms along a level road how large a constant retarding force is required to stop it in a
when a 58-g tennis ball is served it accelerates from rest to aspeed of 39 ms the impact with theracket gives the ball
the speed of a bobsled is increasing because it has an accelerationof 21 ms2 at a given instantin time the forces
consider a head-on collision between two hydrogen atoms bothinitially in their ground state and moving with the same
common brass is a copper and zinc alloy containing 370 zinc by mass and having a density of 848 gcm3 a fitting
a balloon is filled with helium at a pressure of 10 105 pathe balloon is at a temperature of 23degc and has a radius
when heated calcium and hydroxide and ammonium chloride react to produce ammonia gas water vapor and solid calcium
a solid sphere of moment of inertia 25 mr2 rolls without slipping down an incline plane of 30 degrees from a height of
a rocket of mass 45105 kg is in flight its thrust is directed at anangle of 505deg above the horizontaland has a
a rocket rises vertically from rest with an acceleration of32 ms2 until it runs outof fuel at an altitude of 1000 m
naturally occurring iodine has an atomic mass of 1269045 a 123849- sample of iodine is accidentally contaminated with
you wish to prepare 100ml of a buffer solution that is 025 m in carbonic acid ph 725 you have solid h2co3 and solid
for the molecule ch3cooch3 indicate the orbitals involved in the bonding of the carbon and oxygens draw a picture to
acetic acid is a weak acid ch3co2haq ch3co2-aq haqwhen pure hclo4 a strong acid is added to the aqueous solution of