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in a tape recorder the magnetic tape moves at a constant linear speed of 56 cms to maintain this constant linear speed
calculate the amount of heat evolved in the complete oxidation of 817g of al at 25 degrees celcius and 1 atm pressure
buffer a is 1mm total cacodylic acid at ph of 627 with pka of 627 buffer b is 20mm total cacodylic acid at ph 677 with
what is the solubility in milligrams ml of baf2 ksp18 x 10-7 in a solution containing 50 mgml of
a person pulls a toboggan for a distance of 436 m along the snow with a rope directed 283 deg above the snow the
three bottles of aqueous solutions are discovered in an abandoned lab the solutions are green yellow and purple it is
the power radiated by a star is 80 x 1030 w what is the intensity of the radiation from this star at a distance of 10 x
what is the rms current in an rl circuit when a 600hz 240v rms ac voltage is applied where r 170kohm and l 450mh here i
the absorption spectrum of the complex ion rhnh363 has maximum absorbance at 295 nm calculate the crystal field
2bas o2g yields 2baos25 g of ba are oxidized to bao in excess oxygen the product is isolated and its mass is found to
an electron initially at rest is accelerated between two parallel plates 2000 cm apart the space between the plates is
light traveling in henzene n 150 is incident on the flat surface of a piece of plastic it is found that if the light in
what is the molar solubility of aucl ksp20 x 10-13 in pure water at 25 degrees
a conducting sphere with charge -q is surrounded by a concentric conducting spherical shell the shell has a net charge
calcium hydroxide caoh2 dissolves in water to the extent of 104 gl what is the value of ksp for
a bicycle tire whose volume is 41 x 10-4 m3 has a temperature of 283 k and an absolute pressure of 331 x 105 pa a
write equations that show the processes that describe the first second and third ionization energies of a boron atom i
the critical angle for light traveling in a particular optical medium and incident on an interface with air is 467o
a sample of ethyl alcohol c2h5oh has a density of 806 kgm3 and a volume of 173 x 10-3 m3a determine the mass in kg of a
first lab experiment - zinc and copper aqueous solutions were tested in a microscale cell well where the voltage
a quantity of ideal gas requires 800 kj to raise the temperature of the gas by 100 k when the gas is maintained at
a flask contains both a and b both decompose following first-order kinetics with half-lives of 50 and 18 minutes for a
an electron initially at rest is accelerated between two parallel plate 2000 cm apart the pace between the plates is a
the following species which is the best oxidizing agent and which is the best reducing agenta a b a2 c a4 d b e b2- f
consider the titration of a 270 ml sample of 0180 m ch3nh2 with 0150 m hbr determine each of the followinga initial