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? asked in Science & MathematicsChemistry · 5 years ago

Number of molecules in 8.457x10^-2 mol C6H6. Express you answer using four significant figures.?

and number of O atoms in 7.25x10^-3 mol Al(NO3)3. PLEASE HELP

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  • Roger the Mole
    Lv 7
    5 years ago

    (8.457 x 10^-2 mol) x (6.022 x 10^23 molecules/mol) = 5.093 × 10^22 molecules C6H6

    (7.25 x 10^-3 mol Al(NO3)3) x (6.022 x 10^23 molecules/mol) x (9 atoms O / 1 molecule Al(NO3)3) =

    3.93 × 10^22 atoms O

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