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a train consists of 4300kg locomotive pulling two loaded boxcars the first boxcar has a mass of 12700 kg and the second
ammonia and hydrogen chloride gases react to form solid ammonium chloride a 100 l reaction flask contains ammonia at
a 45db sound wave strikes an eardrum whose area is42multiplied by10-5m2a how much energy is absorbed by the eardrum per
calculate the work done when 250 g of tin dissolves in excess acid at 100 atm and 29degc assume ideal gas
a a student must make a five-fold dilution of a 215 m hcl solution if the student wishes to make 750 ml of the diluted
a 250 ml solution of 0600 m edta was added to a 570 ml sample containing an unknown concentration of v3 all v3 present
a refrigerator uses 400 j of work to extract 900 j from a heat reservoir at 000degc what is the coefficient of
you titrate 250 ml of 0110 m nh3 kb 176 x 10-5 with 0100 m hcla what is the ph of the nh3 solution before the
a 300 cm times 500 cm rectangular piece of copper is at a temperature of 100degc the coefficient of linear expansion of
a 100 liter water tank is filled to the brim with water when the temperature is 500degc water has a coefficient of
a pure gold ring and pure silver ring have a total mass of 164g the two rings are heated to 635 c and dropped into a
a model rocket rises with constant acceleration to a height of 38 m at which point its speed is 240 msa how much time
a bat flies toward a wall at a speed of50ms as it flies the bat emits an ultrasonic sound wave with frequency295khz
an ecobotanist separates the components of a tropical bark extract by chromatography she discovers a large proportion
now a second resistor r2 of 32x105 is connected in parallel to the existing resistor in the circuit and a second
find the ph and volume ml of 00372 m naoh needed to reach the equivalence points in titrations of 200 ml of 00892 m
suppose your waffle iron is rated at 085 kw when connected to a 210 102 v sourcewhat current does the waffle iron
an electric heater carries a current of 125 a when operating at a voltage of 360 102 v what is the resistance of the
an unknown solid acid is either triprotic acid or diprotic tartaric acid to determine which you titrate a sample of
a 0050 m h2s solution contains 015 m nicl2 and 035 m hgno32 what ph is required to precipitate the maximum amount of
a guitar string is74cm long and has a mass of 36 g the distance from the bridge to the support post isl 60 cm and the
a gaseous compound containing hydrogen and carbon is decomposed and found to contain 8266 carbon and 1734 hydrogen by
a thin rod length 126 m is oriented vertically with its bottom end attached to the floor by means of a frictionless
how many moles of nh3 must be dissolved in water to give 50 ml of solution with a ph of 1122 and how did you figure
a person bounces up and down on a trampoline while always staying in contact with it the motion is simple harmonic