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a how many milliliters of a stock solution of 100 m hno3 would you have to use to prepare 0450 l of 0500 m hno3 b if
a volleyball is spiked so that its incoming velocity of 40ms is changed to an outgoing velocity of -21 ms the massof
the speed of a bobsled is increasing because it has an accelerationof 24ms2 at a given instant in time the forces
a calculate the molarity of a solution made by dissolving 0750 grams of na2so4 in enough water to form exactly 850ml of
a train is traveling up a 46deg incline at a speed of 327 ms when the last car breaks free and beginsto coast without
in a reaction in which hydrogen reacts with oxygen to produce water which substances are the reactantsa hydrogen onlyb
a horizontal board weighing 2320 nis supported at points a and b in the figure below the plankserves as a platform for
write equations that show the process for the first two ionization energies of tin express your answer as a chemical
1 describe the rutherfords model of the atom and compare it with the model proposed by his student niels bohr2 how many
calculate the molarity of the solution produced by mixing the following substances assume that the volumes are
for fecl3 x 6h2o calculate the percent mass loss if the salt decomposed by simple loss of water and the typical
a compound has an empirical formula of c2h2o and a molecular mass of 1680 the molecular formula is
consider the following reaction 3ab--3c where 2 moles of a react with 1 mol of b to completion which of the statement
a golf ball of mass 0045 kg is hit off the tee at a speed of45 ms the golf club was in contact with the ball for 50
at one time a common means of forming small quantities of oxygen gas in the laboratory was to heat kcio32 kcio33
a 18 g rifle bullet traveling 230 ms buries itself in a 36 kg pendulum hanging on a 28 m long string which makes the
00200 mole of hcl and 00200 mole of naoh react in an open calorimeter and produce 100 j of heat what is the enthalpy of
determine which of the following kinds of light contain enough energy to break chemical bonds in biological molecules
a bullet is fired horizontally with an initial velocity of 250ms from a tower that is 20 m higha calculate the time the
on a frozen pond a 116 kg sled is given a kick that impartsto it an initial speed of vo 215 ms the coefficientof
there is a 5f electron and a 5d whats the allowable combination of quantum numbers i guess what differs the two wouldnt
a 450 kg girl is standing on a 136 kgplank the plank originally at rest is free to slide on a frozenlake which is a
a tennis player receives a shot with the ball 00600 kgtraveling horizontally at 500 ms andreturns the shot with the
calculate the molality of a solution made by dissolving 340 g of nh3 in 200 x 103 ml of water mmnh3 1704 gmol dh2o
a person stands at a point 300 m in frontof the face of a sheer cliff if the person shouts how much time will elapse