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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
josh starts his sled at the top of a 29m -high hill that has a constant slope of 25 degrees after reaching the bottom
describe in detail how you would prepare 300 ml of aqueous 0200m sodium sulfate what mass of sodium sulfate is
during normal operation a computers hard disk spins at 7200 rpm if it takes the hard disk 440 s to reach this angular
suppose that you are going to collect h2 gas produced from the reaction of an acid with a metal such as zinc this
the hubble space telescope orbits earth 601 km above earths surface what is the period of the telescopes
a diverging thin lens and a concave mirror have focal lengths of equal magnitude a object is placed 32f from the