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assume that a particular reaction evolves 224kj of heat and that 24kj of work is gained by the system what are values
many household cleaning products contain oxalic acid h2x2o4 a diprotic acid with the following dissociation constants
gold is a face-centered cubic structure that has a unit cell edge length of 408angstroms there are four gold atoms per
045 g of hydrogen chloride hcl is dissolved in water to make 45 l of solution what is theph of the resulting
comet halley moves about the sun in an elliptical orbit with its closest approach to the sun being about d1059 au and
if ph 64 calculate the molar concentration of h aq in the solution if ph 64 calculate the molar concentration of
calculate the distance michael will travel if he maintain an average speed of 27 ms for 72
how much heat is required to raise the temperature of 485g of water from its melting point to its boiling point express
a flywheel with a radius of 0500m starts from rest and accelerates with a constant angular acceleration of 0500rads2a
a 300-g mass at the end of a hookean spring vibrates up and down in such a way that it is 20 cm above the tabletop at
a 400 kg object is attached to a spring and placed on a horizontal smooth surface a horizontal force of 150 n is
a particle moves along the x axis it is initially at the position 0330 m moving with velocity 0250 ms and acceleration
the position of a particle is given by the expression x 300 m cos400t 4 where x is in meters and t is in secondsa
if this arsenic is present as arsenate aso43- what mass of sodium arsenate would be present in a 110l sample of
q1 at a time t 340s a point on the rim of a wheel with a radius of 0210m has a tangential speed of 530ms as the
the ph of a 0175 m aqueous solution of a weak acid is 352 what is ka for this acid
1 you cool a 1300g slug of red-hot iron temperature 745 c by dropping it into an insulated cup of negligible mass
calculate the pressure of a sample of hydrogen gas collected over water at 247c when the barometric pressure is 7298
1 a steel tank is completely filled with 300 m3 of ethanol when both the tank and the ethanol are at a temperature of
how much heat is required to melt 485g of ice at its melting point express your answer numerically in
2al 6hbr 2albr3 3h2 if 427 g of al reacts calculate the amount of hydrogen
use coulombs law to calculate the ionization energy in kjmol of an atom composed of a proton and an electron separated
a tank holds a 144-m thick layer of oil that floats on a 096-m thick layer of brine both liquids are clear and do not
1 a student who was in a hurry to complete this experiment didnt completely dry the crystalline product before the
solve the following equation for x remember to balance the equation xe 2f2 -gt x in the above question we see the