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determine the volume in ml of 200 m hc2h3o2 required to prepare each of the following solutions 020 m acetic acid and
the ka for acetic acid is 18x10-5 if 340 ml of 345 m acetic acid is added to 823 ml of water what will the ph of the
describe the preparation of 12 ml of a 0050 m solution of the following halogen using the reaction below available to
a thin uniform rod has a length of 0450m and is rotating in a circle on a frictionless table the axis of rotation is
a hockey player uses her hockey stick to exert a force of 178 n on a stationary hockey puck the hockey puck has a mass
a 02kg toy car rolls down ramp if the car started from rest at a height of 030m what is its speed at the bottom of the
a gas mixture composed of helium and argon has a density of 0670 gl at 755 mm hg and 298k what is the composition of
a ferris wheel is moving at an initial angular velocity of 10 rev54s if the operator then brings it to a stop
calculate the molality of commercial hcl solution which is 121molarity and has a density of 119gml and is
an initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature by the
two ropes are pulling upward on a large crate the weight of the crate is 420 n the tension in the left rope is the same
a pinada practically in a shape of a slender thin rod of length mass 40 kg is hanging from the tree branch after being
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