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the mass percent of iron in an iron ore can be determined by converting fe to fe2 in acid solution and then titrating
a 500 ml solution of 12 m hcl at 241 c is mixed with 500 ml of 13 m naoh also at 241 c in a coffee-cup calorimeter
crossfire was a popular board game in which players attempted to propel a puck forward towards their opponets side by
a constant current of 1190 a is passed through an electrolytic cell having an impure copper anode a pure copper cathode
a 12600-kg railroad car travels alone on a level frictionless track with a constant speed of 158 ms a 5350-kg load
ammonia is produced industrially from the reaction of nitrogen and hydrogen write the balanced chemical equation for
1 what causes acid rain why is acid rain more damaging in some lakes than others2 what is the ph of 100 l of rainwater
a 042-kg particle has a speed of 80 ms at point a and kinetic energy of 75 j at point ba what is its kinetic energy at
i solution i is 0088 m in compound z and has an absorbance of 0203 in a 1 cm cell at 520 nm the solvent alone has an
a 200 kg block is on an inclined plane which makes up an angle of 52 degrees to the horizontal the coeff of friction is
which of the following compounds is quite insoluble in water but would liberate a gas when treated with aqueous acetic
what mass of silver iodide can be made by the reaction of 100 g of silver nitrate agno3 with 100 g of sodium iodide nai
the mars reconnaissance orbiter circles the red planet with a 119 period the mass of mars is 6421023 the radius is
a 0411g sample of powdered copper mixed with an inert soluble additive was fully consumed by 234ml of 0602m nitric acid
a white solid is known to consist of one or more of the following compounds agno3 na2co3 cacl2 and pbno32 a sample of
what is the sum of all coefficients in the complete and balanced net equation for the reaction occurring when chlorine
how many microliters of 1000 m naoh solution must be added to 2500 ml of a 01000 m solution of lactic acid to produce a
a crate of mass 115 kg is pulled up a rough incline with an initial speed of 150 ms the pulling force is 100 n parallel
synthesize 2-butanol from an aldehyde and a grignard reagentshow two possible routes to the
what is the percent yield of elemental sulfur if 754 grams of sulfur are obtained from the reaction of 616 grams of so2
a gaseous system undergoes a change in temperature and volume what is the entropy change for a particle in this system
a 250kg child plays on a swing having support ropes that are 180m long a friend pulls her back until the ropes are 450
a 1500 kg mass is lowered 200 m and as it is lowered it runs a generator which lights a 100 watt light bulb assuming
the instruction booklet for your pressure cooker indicates that its highest setting is 134 you know that standard
a uniform disk of mass mdisk 47 kg and radius r 022 m has a small block of mass mblock 2 kg on its rim it rotates