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a solution was prepared by dissolving 250 g of kcl in 225 g of water calculate the mass percent of kcl in the
sarahs twist angular momentum increases from 0 to 50 kgm2s in 025 s as she initiates a twisting jump on the ice during
an olive is at the bottom of a glass of alcohol n 136 651 cm beneath the surface above the alcohol is air to a person
in a large centrifuge used for training pilots and astronauts a small chamber is fixed at the end of a rigid arm that
a 21496-g sample of magnesium is burned in air to form magnesium oxide and magnesium nitride when the products are
planets are not uniform inside normally they are densest at the center and have decreasing density outward toward the
in preparing the sodium thiosulfate solution the solid na2s2o3x5h2o is not dried will this oversight cause the reported
all hydrogen sulfide h2s contained in 400 g of crude oil is removed by distillation and collected in a cdcl2 solution
a race car travels with a constant tangential speed of 824 ms around a circular track of radius 645 m find the
how do you predict the formulas for ionic compounds using the electron dot
if a salty crude sample was analyzed to have 1106ppm salt calculate the pounds of sait per 1000 bbls of
a person is riding a bicycle and its wheels have an angular velocity of 127 rads then the brakes are applied and the
if you pipetted 5000ml sample of an unknown brime and titrated it with 3764ml of 01024m of silver nitrate solution
a biologist keeps a specimen of his favourite beetle embedded in a cube of polystyrene plastic the hapless bug appears
the metal tungsten crystallizes in a body centered cubic unit cell with one atom per lattice point when x-rays with
determine the number of milliliters of standard 01000 m naoh needed to make 2500ml of naoh solution with 0040
1 how many grams of f2 must react with nacl in the following reaction if 800 kj of energy are released 2nacl f2 --gt
find the angular velocity of a clocks second hand and the linear speed and linear acceleration of a point on the second
a 705-kg ball of clay is thrown downward from a height of 408ms onto a spring with k1600 nm the clay compresses the
at an altitude of 10000 ft the partial pressure of oxygen in the lungs is about 68 mm hg what is the concentration in
a 65 diver stands at the end of a 27 springboard the board is attached to a hinge at the left end but simply rests on
1 two manufacturing plants need 10e4 kg of al each week one plant produces the al from bauxite al2o3 whereas the other
a singly charged ion of mass m is accelerated from rest by a potential difference v it is then deflected by a uniform
if you throw a 038 kg ball at a speed of 109 ms and at an angle of 435 above the horizontal from a 148m high buildinga
a small grinding wheel has a moment of inertia of 40times105 what net torque must be applied to the wheel for its