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Sebanyak 12 g logam magnesium direaksikan dengan a...

Sebanyak 12 g logam magnesium direaksikan dengan asam klorida menurut reaksi: undefined 

begin mathsize 14px style Mg italic open parentheses italic s italic close parentheses space plus space H C I italic left parenthesis italic a italic q italic right parenthesis space rightwards arrow space Mg Cl subscript 2 italic open parentheses italic s italic close parentheses italic space plus space H subscript 2 italic open parentheses italic g italic close parentheses end style (belum setara)undefined 

Jika reaksi berlangsung pada STP, berapa volume gas hidrogen yang dihasilkan?undefined 

Jawaban:

begin mathsize 14px style mol space Mg space equals space g over Ar equals 12 over 24 equals 0 comma 5 space mol end style 

reaksi setara :

begin mathsize 14px style Mg italic open parentheses italic s italic close parentheses space plus space 2 H C I italic left parenthesis italic a italic q italic right parenthesis space rightwards arrow space Mg Cl subscript 2 italic open parentheses italic s italic close parentheses italic space plus space H subscript 2 italic open parentheses italic g italic close parentheses end style 

begin mathsize 14px style mol space H subscript 2 space equals space fraction numerator koef space H subscript 2 over denominator koef space Mg end fraction cross times mol space Mg space equals space 1 over 1 cross times 0 comma 5 space mol space equals space 0 comma 5 space mol end style 

begin mathsize 14px style V subscript H subscript 2 open parentheses STP close parentheses end subscript space equals space mol space H subscript 2 space cross times space 22 comma 4 space L space mol to the power of negative sign 1 end exponent V subscript H subscript 2 open parentheses STP close parentheses end subscript space equals space 0 comma 5 space mol space cross times space 22 comma 4 space L space mol to the power of negative sign 1 end exponent V subscript H subscript 2 open parentheses STP close parentheses end subscript space equals space 11 comma 2 space L end style 

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