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the normal boiling point of benzene is 801 c and the heart of vaporization is h 308kjmol what is the boling point of
an aluminum cylinder is suspended in an unknown fluid by a spring scale outside the fluid the object weighs 20n in the
an old fashioned vinyl record rotates at a constant rate of 33 rpm if it plays music for 16 mins how far does a point
when a 470-v emf device is placed across two resistors in series a current of 150 a is flowing in each of the resistors
a 1000kg car moving 40ms skids to a stop during the skid the only force is the frictional force between the tires and
two wheels have the same mass and radius of 41 kg and 038 m respectively one hasa the shape of a hoop and the otherb
when extracting caffeine from coffee is it better to do two extractions with 10 ml of methylene chloride or one
a water heater consisting of a metal coil that is connected across the terminals of a 210-v power supply is able to
the drawing shows an a-shaped ladder both sides of the ladder are equal in length this ladder is standing on a
a biochemist studying the break down of insecticide ddt finds that it decomposes by a first-order reaction w a
a pitcher claims he can throw a 0160-kg baseball with as much momentum as a 250-g bullet moving with a speed of 150 103
a daredevil on a motorcycle leaves the end of a ramp with a speed of 360 ms as in the figure below if his speed is 338
the ph of a 00100 m hypothetical acid ha is 400 calculate the ka for this hypothetical
the constant of a reaction is 35 x 10-3 s-1 at 25 degrees celsius and the activation energy is 336 kjmol what is k at
when a battery is connected to a 890- resistor the current is 391 a when the same battery is connected to a 4170-
the delta h degrees f of tii3 s is -328 kjmol and the delta h degrees for the reaction 2 tis 3 i2g -----gt 2tii3 s is
the acceleration of gravity near the surface of the moon has about on-sixth the magnitude that it does on earth the
kc for the reaction co2 h2--------h2o co is 16 at about 990 c calculate the number of moles of carbon dioxide in the
a skier traveling 120 ms reaches the foot of a steady upward 18deg incline and glides 112 m up along this slope before
you are in a labratory and need to make 90 ml of a solution that is 2 micrograms eb per 01 ml safflower oil outline the
when a 200-kg object is hung vertically on a certain light spring described by hookes law the spring stretches 267 cma
a 202 ml benzene solution containing 227g of an organic polymer has an osmotic pressure of 863 mmhg at 21 degrees
acetylsalicylic acid aspirin hc9h7o4 is the most widely used pain reliever and fever reducer determine the ph of a 0018
a projectile is fired at an upward angle from the top of a 165 m cliff with a speed of 195 ms what will be its speed
a uniform thin rod of length 07 m and mass 30 kg can rotate in a horizontal plane about a vertical axis through its