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what volume will 500 ml of gas at 20 c and a pressure of 420 mm hg occupy if the temperature is reduced to -80 c and
two cars traveling in opposite directions collide head on and are brought to rest if each car has a mass of 1100 kg and
for the reaction shown find the limiting reactant for each of the following initial amounts of reactants
a real heat engine working between heat reservoirs at 970 k and 650 k produces 550 j of work per cycle for heat input
the label on a tank of gas of unknown origin had been lost to determine its identity molecular weight a certain volume
a spherical asteroid with radius of 173 km has uniform density 3500 kgm3 find the gravitational acceleration at the
a sample contained a mixture of mgco3 and baco3 the amount of mgco3 was determined by reacting 1037 g of the sample
a fully loaded boeing 777 commercial airplane with a mass of 3036 tonnes is at one end of the runway and about to take
a sample of chlorine gas is confined in a 208-l container at 338 torr and 500 degrees c how many moles of gas are in
how many liters of gaseous hydrogen bromide at 97 degrees c and 0953 atm will a chemist need if she wishes to prepare
a series rc circuit with c 32 muf and r 68 omega has a 24 v source in it with the capacitor initially uncharged an
a diver of mass 60kg on entering the water with an initial velocity of 1487ms-1 experienced a force of resistance due
a sample of air contains 7808 nitrogen 2094 oxygen 00500 carbon dioxide and 0930 argon by volume how many molecules of
a sample of an unknown gas effuses in 147 min an equal volume of h2 in the same apparatus under the same conditions
a ball of mass 040 kg moves horizontally at a velocity of 250 ms it bounces off of a wall and it has a velocity of 180
calculate the ph of 235 ml of a 165 m aqueous nh3 solution after the addition of 217 ml of 100 m hcl the kb for nh3 is
a substance composed of which of the following molecules will have stronger intermolecular forces co2 or
a 2kg block of wood floats on water with 75 of its volume submerged a steel block is placed on the wood fully
given the following vapor pressures at 20 degrees celsius arrange the compounds in order of increasing boiling point
a 180 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 149 ms the
the activation energy for a particular reaction is 64 kjmol by what factor will the rate constant increase when the
calculate the current ma required to deposit 089g of tungsten metal in 45 minutes from a solution of wo42- atomic
what type of crystal lattice does each metal form the number of atoms per unit is given in parentheses ni 4 cr 2 ca
a rectangular coil with dimensions of 80 cm times 10 cm is dropped from a zero magnetic field position to a 14 t
nickel ni can be plated from aqueous solution by the half-reaction ni2aq2e-nis how long will it take to plate 296 g of