document.write( "Question 1033113: The container held the compound (As) sub four O sub 6
\n" ); document.write( "and What was the percentage by weight of the Arsenic in this compound (As, 75;O,16) \n" ); document.write( "

Algebra.Com's Answer #647996 by KMST(5328) $\"\"$ $\"About$

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The formula of the compound is $\"As%5B4%5D\"$ $\"O%5B6%5D\"$ , meaning that a molecule or formula unit comprises $\"4\"$ atoms of $\"As\"$ , and $\"6\"$ atoms of $\"O\"$ .
\n" ); document.write( "The mass of the $\"4\"$ atoms of $\"As\"$ ,
\n" ); document.write( "each with a mass of $\"75\"$ atomic mass units, adds up to
\n" ); document.write( " $\"4%2A75=300\"$ .
\n" ); document.write( "The mass of the $\"6\"$ atoms of $\"O\"$ ,
\n" ); document.write( "each with a mass of $\"16\"$ atomic mass units, adds up to
\n" ); document.write( " $\"6%2A16=96\"$ .
\n" ); document.write( "The total mass of the molecule is $\"300%2B96=396\"$ atomic mass units,
\n" ); document.write( "and out of that total, the mass of the arsenic is
\n" ); document.write( " $\"300\"$ atomic mass units.
\n" ); document.write( "As a fraction, that is
\n" ); document.write( " $\"300%2F396=about0.76=about76%2F100=about76%25\"$ (rounding to whole numbers, or 2 significant figures, as a chemistry teacher might say). \n" ); document.write( "

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