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iron ore can be treated with hcl and various reagents to convert the iron to fe2 which can then be assayed by titration
after a shipwreck a solid steel spoon lies at the bottom of the ocean 910 km below the surface whats the water pressure
53576g of mgso4 2h2o are dissolved in 25000 ml of 150 m bano32 solution to produce barium sulfate precipitate how many
ball 1 with mass of 100g and traveling at 10 ms collides head-onwith ball 2 which has a mass of 300g and is initially
a researcher conducting a large-scale experiment dissolved 7500 g of calcium chloride in a tank the resulting solution
a spring stretches by 00240 m when a 340-kg object is suspended from its end how much mass should be attached to this
a square coil enclosing an area with sides 46 cm long is wrapped with 3149 turns of wire a uniform magnetic field
a lunch tray is being held in one hand as the figure illustrates the mass of the tray itself is 0214 kg and its center
if a test tube contains equal concentrations of ba2 pb2 cu2 and na1 describe how ions might be separated from one
a string with a mass m 600 g and a length l 500 m has one end attached to a wall the other end is draped over a small
for the galvanic cell employing the cu cu2 and cd cd2 couples calculate the maximum amount of work that would accompany
a 1 m stick is used as a simple pendulum with a 2 kg weight on the end what is its period of
a merry-go-round is shaped approximately as a disk and has a radius of 21m and a mass of 172kg starting from rest a boy
1 acetic acid ch3cooh freezes at 166ordmc the heat of fusion dhfus is 690 jg what is the change of entropy ds when 1
a object-spring system oscillates with an amplitude of 28 cm if the spring constant is 205 nm and object has a mass of
a cube made of pt has an edge length of 10 cm cubed b the spherical pt atoms in the cube cannot fill all of the
a roller coaster is pulled up a hill of height 95m before being released to coast down a ramp that is inclined at 56
a 117-cm-long 400g string oscillates in its n 4 mode with a frequency of 200 hz and a maximum amplitude of 550 mm what
on top of one of the peaks in rocky mountain national park the pressure of the atmosphere is 500 torr determine the
a student stands initially at rest at the center of a turntable that can rotate without friction the student begins to
calculate the energy needed to convert 500 g methane ch4 from a solid at -shy-100degc to a liquid at
two masses are connected by a string mass a is on a flat roof and mass b is hanging over the edge of the roof the mass
two drugs have no common primary or secondary effects in common would you expect these drugs to produce dangerous
a potters wheel-a thick stone disk of radius 0500 m and mass 125 kg-is freely rotating at 500 revmin the potter can
a hydrogen atom undergoes a transition from a 2p state to the 1s ground state in the absence of a magnetic field the