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a certain amount of oxygen gas occupies a volume of 12 liters when its temperature is 20c and its pressure is 1 atm
imagine that you have a 650 gas tank and a 250 gas tank you need to fill one tank with oxygen and the other with
a 545 g ice cube initially at 0degc is dropped into a styrofoam cup containing 363 g of water initially at 212degc what
three identical resistors are connected in series when a certain potential difference is applied across the combination
what is the ph of a solution obtained by mixing 50ml of 002 m sodium acetate with 40ml of 001 m
you make 100 l of a buffered solution ph 400 by mixing acetic acid and sodium acetate you have 100 m solutions of each
a life preserver made of styrofoam is designed to support a person weighing 575 n with 80 of the body and 90 of the
a watertight car is submerged under water what force is required to open a door of area 125 m2 if the average depth of
for a long solenoid the magnetic field strength within the solenoid is given by the equation where t is time in seconds
what volumes of 053 m hno2 and 059 m nano2 must be mixed to prepare 100 l of a solution buffered at ph
a boxer receives a horizontal blow to the head that topples him over the force of magnitude 106 x 103 n is applied for
a 1300 g sample of an ionic compound naa where a- is the anion of a weak acid was dissolved in enough water to make
a toy car with a mass of 120 g moves to the right with a speed of 040 ms a small child drops a 380-g piece of clay onto
a capacitor is charged to a potential of 120 v and is then connected to a voltmeter having an internal resistance of
the ksp for silver sulfate ag2so4 is 12 multiplied by 10-5 calculate the solubility of silver sulfate in each of the
a 650fcapacitor that is initially uncharged is connected in series with a 4500resistor and a 505 v emf source with
the copperi ion forms a chloride salt that has ksp 12 10-6 copperi also forms a complex ion with cl cuaq 2 cl aq
a grandfather clock is controlled by a swinging brass pendulum that is 13 m long at a temperature of 30degca what is
a solution is prepared by mixing 500 ml of 029 m pbno32 with 500 ml of 19 m kcl calculate the concentrations of pb2 and
you need to make a series ac circuit having a resonance angular frequency of 1600 rads using a 148 ohm resistor a 109
a 118-g ball is traveling to the left with a speed of 26 ms when it is struck by a racket the force on the ball
the mole fraction of oxygen molecules in dry air is 02095 what volume of dry air at 100 atm and 25degc is required for
calculate the mass of sodium acetate that must be added to 5000ml of 0200m acetic acid to form a ph 500 buffer
a proton is moving along the axis of a uniformly charged thing ring of 20nccm the radius of the ring is 5cm if the
an orchestra is tuning its instruments using a tone at a frequency of 440 hz a man comes zipping by on a very quiet