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the half-life of cobalt-60 is 52 yr how many milligrams of a 2000-mg sample remains after 655 years show your
how would a student make 5000 ml of a 007000 m solution of iron iii using a stock solution that is 02550 m in iron iii
the comosition of the hull of a submarine is mostly iron pieces of zinc called zincs are placed in contact with the
over the years the thermite reation iron 3 oxide combining with aluminum metal has been used for welding railroad rials
1 how can 400 ml of 200 m hno3 be prepared from concentrated nitric acid 16m hno32 balance the following eq in acidic
a sample of steam with a mass of 0552 g and at a temperature of 100 degrees c condenses into an insulated container
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
instant cold packs often used to ice athletic injuries on the field contain ammonium nitrate and water separated by a
when backpacking in the wilderness hikers often boil water to sterilize it for drinking suppose that you are planning a
milk of magnesia mgoh2 is prepared from aqueous solutions of magnesium sulfate and sodium hydroxide if a solution
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
for a particular reaction the hydroxide ion is one of the reactants doubling the concentration of the hydroxide ion
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
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 1st order reaction is 582 complete in 482 minutes determine the half-life of this
one of the constituents of turpentine is a-pinene formula c10h16 the following scheme called a road map gives some
give a proposed mechanism for the base catalyzed tautomerism of the following enol to acetonewhere the equal sign is
explain why the notation gly-val and val-gly represent two different molecule rather than the same
can solution color be predicted from the absorbance wavelength max or transmission wavelength max colors1 aluminum
explain how the nitrogen cycle works in the ocean to me i am looking at a diagram of it but not completely sure how to