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butane has a heat of vaporization of 2244 kjmol and a normal boiling point of -04 c a 250 ml sealed flask contains 075
spark plugs should be tightened to a specified torque of 1364nm you have a wrench that is 027 m long but because of the
a small steel ball bearing with a mass of 170 g is on a short compressed spring when aimed vertically and suddenly
if your body develops a charge of -11 microcoulombs how many excess electrons has it
one end of an insulated metal rod is maintained at 100 while the other end is maintained at 0 by an ice-water mixture
radio waves travel at the speed of light which is 300 x 108 ms how many kilometers will radio messages to outerspace
a mineral oil has a density of 0875gcm3 suppose you spread 065g of this oil over the surface of water in a large dish
a mass m05kg is hung from a pulley with moment of inertiai020 kgm2 and radius r10cm there is frictionin the pulley the
a horizontal force of 80 n acts on a mass of 6 kg resting on a horizontal surface the mass is initially at rest and
what is the percentage of fe in ironii ammonium sulfate hexahydrate fenh42so42 6
a styrofoam bucket of negligible mass contains 175 of water and 0450 of ice more ice from a refrigerator at -140 is
a star is 494 times 1020 m from the earth if this star was to burn out today how many years would it take before we
the energy required for the ionization of a certain atom is 344 x 10-18 j the absorption of a photon of unknown
suppose a hockey puck slides down a frictionless ramp with an acceleration of 500 ms2awhat angle does the ramp make
a copper pot with a mass of 0505 contains 0175 of water and both are at a temperature of 210 a 0255 block of iron at
calculate the ph of a dilute solution that contains a molar ratio of potassium acetate to acetic acid pka 476 of a 211
an egg with a mass of 40 grams is on a table of 1 meter high it falls and breaks if the collision with the ground is
what is the formula of the ionic compound expected to form between the elements chlorine and potassiumwhat is the
two liquids and have vapor pressures at a given temperature of 24 and 36 respectively we prepare solutions of and at
a laser beam is incident at an angle of 440deg to the vertical onto a solution of corn syrup in watera if the beam is
a blacksmith cools a 130- chunk of iron initially at a temperature of 6500 by trickling 156 water over it all the water
a write out the acid dissociation reaction for hydrochloric acid b calculate the ph of a solution of 50 x 10-4 m hcl c
a plastic light pipe has an index of refraction of 153 for total internal reflection what is the minimum angle of
liquid nitrogen comes in large cylinders that require special tank carts and hold 120l of liquid at 77k given the