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a sample of 15 g nawo4 dehydrate is dissolved in 25 ml di h2o 75g granulated zn was added then heated to 70 c 75 ml of
a mass of 125 kg is hanging by a steel wire 113 m long and 103 mm in diameter if the mass is pulled down slightly and
a portable dvd player is operated by rechargeable batteries the batteries are recharged by a unit that plugs into a
a beaker with 200 ml of an acetic acid buffer with a ph of 500 is sitting on a benchtop the total molarity of acid and
the highest theoretical efficiency of a gasoline engine based on the carnot cycle is 0300 or 300a if this engine expels
the 2s and 3s atomic orbitals of the h atom are orthogonal if they are both spherical in shape so what makes them
the kingston steam plant burns 14000 tons of coal each day and generates 1010 kilowatts-hours of electricity each
a particle having a mass of 0200 g carries a charge of 234times108 c the particle is given an initial horizontal
in order to determine the mass of a molecule first an electron is removed from the molecule the resulting ion is
the composition by mass of methyl alcohol ethyl alcohol n-propyl alcohol and water in two solutions a and b are given
a skier m610 kg starts sliding down from the top of a ski jump with negligible friction and takes off horizontally if h
a proton moves perpendicular to a uniform magnetic field its trajectory is a circle of radius 031 m with a period of 21
a 5000g sample of pesticide was decomposed with metallic sodium in alcohol and the liberated chloride ion was
a 220 kg child slides down a slide that makes a 370deg angle with the horizontala what is the magnitude of the normal
a chemist creates a buffer using benzoic acid ka63010-5 and sodium benzoate by mixing 5000ml of 0950m benzoic acid with
an electron and proton are separated by 20 nma what is the magnitude of the force on the electronb what is the net
a 02570g of pure sulfamic acid hso3 nh2 is neutralized by a koh solution a 2570 ml of koh was added to the solution
in a certain organic molecule the nuclei of two carbon atoms are separated by a distance of 025 nm what is the
a rock is thrown from the roof of a building with a velocity v0 at an angle alpha0 of from the horizontal the building
nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation n2g 3h2g 2nh3g
carbon-14 has an activity of 025 bq per gram of carbon for living organisms the half-life of carbon-14 is 5730 years if
explain how you would prepare 5000ml of a solution that is 0100m h2so4 from concentrated 180m h2so4 which is a liquid
an unknown substance has a mass of 0125 kg and an initial temperature of 775degc the substance is then dropped into a
what is the freezing point in of a solution prepared by dissolving 480 of in 110 of water the value of for water is 186
a particular reaction is spontaneous at 450k the enthalpy change for the reaction is 345 kj what can you conclude about