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a sample of zinc nitride zn3n2 contains 390 g of zinc how many nitride ions are
a 100 m rope of negligible mass connects two astronauts each having a mass of 750 kg they are isolated in space
what is the percentage by mass of nitrogen atoms in ammonium phosphate
a girl is pushing on a 45 kg dresser with 300 n of force the dresser has a coeficient of statice friction of 083 and a
a sample of k2s contains 135 g of potassium how many moles of potassium sulfide are present in the
a 600 kg person running at an initial speed of 325 ms jumps onto a 120 kg cart that is initially at rest the person
a solenoid 30 cm long consists of 3921 loops of wire if the magnetic field inside the solenoid is 40 t what is the
calculate the number of atp molecules that are produced from the biological oxidation of one molecule of each of the
an organic acid contains 414 carbon 347 hydrogen and 551 oxygen by weight a 0080-mol sample of this compound weighs
a 10 n horizontal force f pushes a block weighing 90 n against a vertical wall the coefficient of static friction
a sample of oxide of antimony sb contains 305g of antimony combined w10g o2 whats the simplest formula for the
a boy gets ready to slide down an icy hill with his sledassume that the friction from the ground is negligiblewhat
the ka of hno2 is 71 x 10-4 use this to find the volume ml and ph of 00588 m koh needed to reach the equivalence points
what is the ag in a solution at equilibrium when ammonia gas is bubbled through a solution that is 0023m in agno3 until
two conducting spheres are placed with their centers 0325 m apart one is given a charge of 110 nc and the other a
what volume of 0200 m hcl must be added to 2500 ml of 0300 m sodium mandelate ka for mandelic acid 00004 to produce a
what mass of sodium formate must be added to 4000 ml of 100 m formic acid to produce a buffer solution that has a ph of
a cannonball is fired from a canon at an angle of 45 degrees to the horizontalthe cannonballs initial velocity is 40
two men lift a 45 kg block from the floor to a shelf 10 meter above the floor without accelerating the block how much
what is the freezing point of a 286 by mass aqueous solution of hcl assume the hcl is 100
the combustion of gasoline produces carbon dioxide and water assume gasoline to be pure octane and calculate the mass
a 3600 kg truck is moving at a constant speed of 500 ms the coefficient of friction between the tires and the road is
a 07995 g sample of a compound containing only uranium and chloride is dissolved in water and excess aqueous silver
wrongly called for a foul an angry basketball player throws the ball straight down to the floor if the ball bounces
what ph is needed to increase the solubility of mnoh2 to 25 x 10-3m ksp for mnoh2 16 x