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Hitunglah massa masing-masing zat berikut: molekul (Ar S=32)

 Hitunglah massa masing-masing zat berikut:

begin mathsize 14px style 1 comma 204 x 10 to the power of 22 end style molekul begin mathsize 14px style S subscript 8 end style (Ar S=32)

Jawaban:

Berikut adalah tahapan menentukan massa begin mathsize 14px style S subscript 8 end style :

1. Menentukan mol zat

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row X equals cell space n space x space L end cell row X equals cell jumlah space partikel end cell row n equals cell mol space zat end cell row L equals cell bilangan space Avogadro space left parenthesis 6 comma 02 x 10 to the power of 23 right parenthesis end cell end table end style 

Sehingga,

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row n equals cell X over L end cell row blank equals cell fraction numerator 1 comma 204 x 10 to the power of 22 over denominator 6 comma 02 x 10 to the power of 23 end fraction end cell row blank equals cell 0 comma 2 space mol end cell end table end style 

2. Menentukan massa begin mathsize 14px style S subscript 8 end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row m equals nxMr row m equals cell massa space zat open parentheses g close parentheses end cell row n equals cell mol space zat end cell row Mr equals cell massa space molekul space relatif left parenthesis g forward slash mol right parenthesis end cell end table end style 

Sehingga,

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell Mr space S subscript 8 end cell equals cell Ar space S space x space 8 end cell row blank equals cell 32 x 8 end cell row blank equals cell 256 space g forward slash mol end cell end table end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell massa space S subscript 8 end cell equals cell 0 comma 2 space molx 256 space g forward slash mol end cell row blank equals cell 51 comma 2 space g end cell end table end style 

Berdasarkan perhitungan di atas, maka massa begin mathsize 14px style S subscript 8 end style adalah 51,2 g.

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