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when a 0245 sample of benzoic acid is combusted in a bomb calorimeter the temperature rises 1644 when a 0265 sample of
dan hits a hockey puck giving it an initial velocity of 30ms if the coefficient of kinetic friction between ice and
a student wishes to prepare 400 ml of a buffer of ph 840 using the base tris and its hydrochloric salt the molecular
a diver springs upward from a three-meter board at the instant shecontacts the water her speed is 890ms and her body
a person is riding a bicycle and itswheels have an angular velocity of 250 rads thenthe brakes are applied and the bike
a projectile is fired vertically from earths surface with aninitial speed of 46 kms neglecting air drag how far above
a sample of the weak base hydroxylamine is titrated with 00900 m hcl 300 ml is required to reach the endpoint after the
65kw is to arrive in a town over two 0100omega lines estimate how much power is saved if the voltage is steped from120v
a quantity of co gas occupies a volume of 034l at 19atm and 309k the pressure of the gas is lowered and its temperature
a lumberjack m 98 kg is standing at rest on one end of afloating log m 230 kg that is also at rest the lumberjackruns
caculate the ph of a solution that has 4000 ml of 00900 m nh3 and 01000 m hcl is being added at a volume of 3595
a solid horizontal cylinder of mass 90 kg and radius 130 mrotates with an angular speed of 600 rads about a fixed
calcium fluoride is a solid that only slightly soluble in water the solubility product of caf2 is 3x10-11a write the
scarlet has taken a summer job at a water park in her act sheglides up a 20 m high frictionless ramp then sails over a
the pressure of 70 l of an ideal gas in a flexible container is decreased to one-half of its original pressure and its
a local jeweler purchased large amounts of pure silver because he and his staff wanted to design a new line of silver
a space station consists of two donut-shaped living chambers aand b that have the radii shown in the figure as the
a 160 kg horizontal beam is supported at each end a 300 kg piano rests a quarter of the way from one end what is the
if you have the compound na2taf7 how do you determine the charge of the cation for the transition metal in this case ta
suppose that in procedure to separate benzoic acid you mistakenly added 20 ml of aqueous nahco3 at once instead of
a ball of mass 0120 kg is dropped from rest from a height of125 m it rebounds from the floor to reach a height of0600 m
four railroad cars each of mass300 x 104 kg are coupled together and coastingalong horizontal tracks at speed vi toward
you are given a 148 m solution of ammonia in water how many milliliters of this solution do you require to produce 75
at 25 degrees celcius only 00900 mol of generic salt ab is soluble in 100l of water what is the ksp of the salt at 25
starting from rest a 52-kg blockslides 240 m down a rough 300degincline the coefficient of kinetic friction between the