What is the percent composition by weight of $Al$ in $Al_2(SO_4)3$ ?

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Answer 1 · 2016-05-02T09:22:07

$%"Composition"="Mass of component"/"Molar mass of compound"$ $xx100%$ , approx. 16% with respect to aluminum.

$(2xx26.98*g*mol^-1)/(342.15*g*mol^-1)xx100%$ $=$ $??%$

What is the percent composition by weight of AlAl in Al_2(SO_4)3Al_2(SO_4)3?