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a 70-kg diver steps off a 10-m tower and drops from reststraight down into the water if he comes to rest at 50-m
to obtain a 180 wv solution of copper sulfate cuso4 mw 160 when only the crystalline salt is available cuso4 x 5h2o mw
two wires each 24 m long are taped together to form atwo-wire unit that is 24 m long one wire carries a current of700a
5 ml of acetic anhydride and 5 drops of phosphoric acid is added to 2 g of salicylic acid calculate the molar excess of
a 21103-kg car starts from rest atthe top of a50-m-long driveway that is sloped at 20 degrees with thehorizontal if an
for the following combination of reactants enter the formulae of the products in the space provided and give their
oxygen masks for producing o2 in emergency situations contain potassium superoxide kp2 it reacts with co2 and h2o in
sand consist mainly of silicon dioxide when sand is heated with an excess of coke carbon pure silicon and carbon
a 17 cm radius air duct is used to replenish the air of a room92 m x 50 m x 45 m every ten minutes how fast does the
what atomic or hybrid orbitals make up the sigma bond between ge and h in germanium hydride geh4 what is the
which element will display an unusually large jump in ionization energy values between i3 and i4 its third and forth
200 grams of iron at 100 degrees c is dropped into aninsulated beaker containing 500 grams of water at 20 degrees
what reasons can you give that paracetamol is much milder on the stomach than either asprin or
suppose that a certain biologically important reaction is quite slow at physiological temperature 37c in the absence
1 a persons blood alcohol c2h5oh level can be determined by titrating a sample of blood plasma with a potassium
a magnetic dipole with a dipole moment of magnitude0016 jt is released from rest in auniform magnetic field of
paracetamol is similar to asprin in that p-aminophenol is reacted with acetic anhydride and yet the amino group is
identify the acid and the base in the following reactions type your answer using the format co2 for co2 nh42co3 for
give the balanced net ionic equations with states of matter indicated for the process taking place when the named
if solvent evaporates during an experiment what effect if any would this have on the freezing point determined for the
osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of
if 2695 ml of a standard 01650 m naoh solution is required to neutralize 3717 ml of h2so4 what is the molarity of the
what is the molar concentration of a h2so4 solution if a 75 ml sample requires 15 ml of a 155 m solution of naoh to
a solution is prepared by adding 500 ml of 0050m hbr to 1500 ml of 010m hi calculate the concentration of all species