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a crate of mass 20 kg is pushed up a ramp by a person as shown in the figure below the person pushes the crate a
calculate the ph of a solution prepared by mixing 00800 mol of chloroacetic acid plus 00400 mol of sodium chloroacetate
a crate of mass 46 kg is pushed across a level floor by a person if the person exerts a force of 31 n in the horizontal
calculate the ph of a solution prepared by mixing 00100 mol of the base b kb 10-200 with 00200 mol of bhbr- and
the electric field midway between two equal but opposite point charges is 755 nc and the distance between the charges
a system of 1454 particles each of which is either an electron or a proton has a net charge of -7456times10-17 chow
a calculate the ph of a solution prepared by mixing 100 g of imidazole with 100 g of imidazole hydrochloride and
a neutron star is the remnant left after certain supernovae explosions of giant stars typically neutron stars are about
a chemist decomposes several samples of water into hydrogen and oxygen and weighs the hydrogen and oxygen obtained the
a 09-kg block begins to move when it is pulled by a rope on a horizontal surface by a 3-n force the coefficient of the
an aqueous solution of iron iii chloride reacts with magnesium solid to give solid iron an aqueous magnesium chloride
ethanol c2h5oh boils at 78c its density is 0789 gml the enthalpy of vaporization is 3856 kjmol the specific heat of
calculate what mass of solid potassium monohydrogen phosphate should be dissolved in this solution to yield the
a total of 200 of a compound is allowed to react in a foam coffee cup that contains 130 of water the reaction caused
an object at rest on a flat horizontal surface explodes into two fragments one seven times as massive as the other the
at a given temperature the vapor pressures of benzene and toluene are 183 mm hg and 592 mm hg respectively calculate
at 80 degrees celsius pure liquid a has a vapor pressure of 700 mm hg and pure liquid b has vapor pressure of 940mm hg
two long parallel wires each carry 23a in the same direction with their centers 15cm apartfind the magnitude of the
calculate the heat energy released when 134 g of liquid mercury at 2500 degree c is converted to solid mercury at its
you are standing on a scale inside an elevator the scale reads 112 percent of your weight what is the acceleration of
draw 4-fluoro-22-dimethylhexane using wedgesdashes amp use newman projections along the c3-c4 bond to show the most
two electrons are located at two of the vertices of an equilateral triangle one at each vertex the length of one side
a closely wound circular coil with a diameter of 480 cm has 625 turns and carries a current of 0540 a what is the
what part of the electromagnetic spectrum is known as the infrared region express your answer in terms of wavenumbers
a concave mirror forms an image on a screen twice as large as the object both the object and the screen are then moved