diketahui massa atom relatif ar o 16 al 27

Pembahasan

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell M subscript r space Al subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 end cell equals cell left parenthesis 2 cross times A subscript r space Al right parenthesis plus left parenthesis 1 cross times 3 cross times A subscript r space S right parenthesis plus left parenthesis 4 cross times 3 cross times A subscript r space O right parenthesis end cell row blank equals cell left parenthesis 2 cross times 27 right parenthesis plus left parenthesis 1 cross times 3 cross times 32 right parenthesis plus left parenthesis 4 cross times 3 cross times 16 right parenthesis end cell row blank equals cell 54 plus 96 plus 192 end cell row blank equals 342 end table end style

Jadi, massa molekul relatif begin mathsize 14px style bottom enclose Al subscript bold 2 bold open parentheses S O subscript bold 4 bold close parentheses subscript bold 3 end enclose end style sebesar 342.

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