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a student tried to detect the presence of calcium ion in milk by adding na2so4 solution to a sample of milk what is the
how many grams of baoh2 are needed to prepare 650ml solution to a 09m
a 145 g baseball is dropped from a tree 90 m above the grounda with what speed would it hit the ground if air
1 find the volume in milliliters of 035 naoh required to neutralize the hcl produced by complete solvolysis of 1ml of
a crate of mass 140 kg is pulled upa rough incline with an initial speed of 150 ms the pullingforce is 100 n parallel
325 grams of mg is dropped into 125 ml of hydrochloric acid the initial temperature of the calorimeter is 185degc and
why do you not need to accurately measure the volume of deionized water in which you dissolve the iron
determine the amount of heat evolved in the combustion of 1 mol of methane gas to carbon dioxide and water liquid
a flat coil of wire consisting of 20 turns each with an area of 50 cm2 is positioned perpendicularly to a uniform
how many unpaired electrons can coii possibly have in a tetrahedral octahedral and square planar
negative ions might be expected to create stronger ligand fields than neutral molecules on the basis of the pure
a boy on the edge of a vertical cliff 20 m high throws a stonehorizontally outward with a speed of 20 ms it strikes the
a rope is used to pull a 357 kg block at constant speed526 m along a horizontal floor the forceon the block from the
a compound contains 2371 o 2376 s 5247 cl if it takes 46 seconds for this compound to effuse through the same plug
a 100 kg rocket is fired vertically its fuel gives ita kinetic energy of 1960j what additional height will the rocket
calculate energy emitted by an electron in the 8th energylevel relaxing to the 2nd enegy le el in a be 3 ion calculate
a pendulum bob of mass 05 kg is suspended by ahorizontal string of length 1 m and let go it collides elastically with a
proteins are least soluble and often precipitate when the ph of the solution equals their pi this property may be used
potassium sulfate solution reacts with barium bromide solution to produce a precipitate of barium sulfate and a
a spacecraft moving away from earth emits a 4327 hz signal a scientist on earth measures thesignal to be 4323 hz what
you add 1000 g of water at 60 degrees celsius to 100 g of ice at 0 degrees celsius some of the ice melts and cools the
a 30-kg child rides on a circus ferriswheel that takes her around a vertical circular path with a radiusof 20 m every
to make a bounce pass a player throws a 060 kg basketball toward the floor the ball hits the floor with a speed of 65
hemoglobin the red blood protein responsible for oxygen transport binds about 134cm3 of oxygen per gram normal blood
in 111 s 205 bullets strike and embed themselves in a wall the bullets strike the wall perpendicularly each bullet has