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the complete combustion of hydrogen h2g to form h2ol at constant pressure releases 2858 kj of heat per mole of h2g
an unknown nucleus has twice the volume of a nucleus with 51 nucleons what is the atomic mass number of the unknown
hydrogenation of carbon double bonds cc ie adding a hydrogen on each carbon atom and thus reducing the double bond into
when 0564g of biphenyl c12h10 undergoes combustion in a bomb calorimeter the temperature rises from 253c to 298c find
an electron that has an energy of approximately 23 ev moves between rigid walls 18 nm aparta find the quantum number n
calculate the hydronium ion concentration and the ph of the solution that results when 200 ml of 015m acetic acid is
for the real or imaginary nucleus of 85x210 finda the net electrical charge of the nucleusb the number of neutronsc the
nitrogen oxides nox play an essential role in the production of pollutants found in photochemical smog the nox in the
an ideal gas expands isothermally performing 430times103j of work in the processcalculate the change in internal energy
consider the following ions nh4 co32-br-s2-clo4- a which of these ions in water gives an acidic solution b which of
a you wish to determine the height of the smokestack of a local coal burning power plant you convince a member of the
hot water at 90 degrees c is poured into a large styrofoam cup that contains water at 20 degrees c the final
it takes 530 j to raise the temperature of an 102 g piece of unknown metal from 130 c to 249 c what is the specific
a classroom demonstration is done with an atwood machine the masses are m1 10 kg and m2 110 kg if the larger mass
a solid disk of radius 650cm and mass 135kg which is rolling at a speed of 270ms begins rolling without slipping up a
the specific heat capacity of liquid water is 418 jg-k how many joules of heat are needed to raise the temperature of
two identical coils are parallel to each other on the same axis they are separated by a distance equal to their radius
strontium-90 is present in the fallout produced by nuclear weapons testing in the atmosphere sr-90 is potentially
plutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power reactors it has a
only about 5 of the energy in the universe is composed of baryonic mattera estimate the average density of baryonic
a double-slit experiment is set up using a helium-neon laser 633nm then a very thin piece of glass n150 is placed over
a ball with a mass of 05kg and a diameter of 04 m floats so acceleration 0 in the ocean salt watera what is the
the velocity-time graph of part of a cyclists trip consists of a straight line between v 240 ms at t 130 s and v 0
a copper kettle contains water at 228deg c when the water is heated to its boiling point the volume of the kettle