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a 273 g sample of a substance suspected of being pure gold is warmed to 729 degrees c and submerged into 160 g of water
022 m weak acid is titrated with a 011 m strong base and the ph at the halfway point measured at 401 what is the ka
estimate the resolution of the human eye limited by diffraction find the minimum resolvable separation between two
instant cold packs often used to ice athletic injuries on the field contain ammonium nitrate and water separated by a
in a youngs double-slit experiment with electromagnetic radiation that is not necessarily visible the 1st fringe
when backpacking in the wilderness hikers often boil water to sterilize it for drinking suppose that you are planning a
a 7 g bullet moving horizontally at 200 ms passes through a 150 g tin can sitting on a post just after impact the can
milk of magnesia mgoh2 is prepared from aqueous solutions of magnesium sulfate and sodium hydroxide if a solution
a 206kg rock sits in full sunlight on the edge of a cliff 5m high the temperature of the rock is 302 degrees celcius if
the record of 2031 kmh for speed skiing set by franz weber at velocity peak in colorado was achieved in a mountain
potash is composed mainly of potassium caronate k2co3 if 1000g of potash reacts with sulfuric acid to produce 145 ml of
a 10000-g sample of toothpaste containing stannous fluoride gives a 0145-g precipitate of stannous phosphate what is
sources a and b emit long-range radio waves of wavelength 330 m with the phase of the emission from a ahead of that
for a particular reaction the hydroxide ion is one of the reactants doubling the concentration of the hydroxide ion
the 20 cm diameter coil shown below has 25 turns and has a current flowing through it of 500 a the magnetic field
tooth enamel in mainly hydroxyapatite ca10po46oh2 if 1117g of tooth enamel reacts with acid to give 1111g of calcium
if this cell is at standard conditions cu2 and al3 solutions 10 m and 25 degrees celsius what is the spontaneous redox
in going across a row of the periodic table protons and electrons are added and ionization energy generally increases
what is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 530nm
two slits separated by a distance of d 013mm are located at a distance of d 710mm from a screen the screen is
the atomic radius of nickel is 124 pm and the average mass of nickel is 586934 amu how do i calculate the density of
a tall tree is growing across a river from you you would like to know the distance between yourself and the treeas well
a 1st order reaction is 582 complete in 482 minutes determine the half-life of this
during a test a nato surveillance radar system operating at 12 ghz at 155 kw of power attempts to detect an incoming