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Hitunglah berapa mol zat berikut: 54 g aluminium 22 g gas karbondioksida 54 g air 30 g etanol

Hitunglah berapa mol zat berikut:

  1. 54 g aluminium
  2. 22 g gas karbondioksida
  3. 54 g air
  4. 30 g etanol

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L. Avicenna

Master Teacher

Mahasiswa/Alumni Institut Teknologi Bandung

Jawaban terverifikasi

Jawaban

mol30 gram etanoladalah 0,65mol.

 mol 30 gram etanoladalah 0,65 mol.space 

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Pembahasan

1. Menghitung mol 54 gram aluminium Jadimol 54 gram aluminium adalah 2 mol. 2. Menghitung 22 gram gas karbondioksida Jadimol 22 gram gas karbon dioksidaadalah 0,5 mol. 3. Menghitung mol54 gram air Jadi mol54 gram air a dalah 3mol. 4. Menghitung mol30 gram etanol Jadimol30 gram etanoladalah 0,65mol.

1. Menghitung mol 54 gram aluminium

mol space Al equals fraction numerator massa space Al over denominator A subscript r space Al end fraction mol space Al equals fraction numerator 54 space gram over denominator 27 space gram space mol to the power of negative sign 1 end exponent end fraction mol space Al equals 2 space mol 

Jadi mol 54 gram aluminium adalah 2 mol.
 

2. Menghitung 22 gram gas karbondioksida

mol space C O subscript 2 equals fraction numerator massa space C O subscript 2 over denominator M subscript r space C O subscript 2 end fraction mol space C O subscript 2 equals fraction numerator massa space C O subscript 2 over denominator left parenthesis left parenthesis 1 cross times A subscript r space C right parenthesis plus left parenthesis 2 cross times A subscript r O right parenthesis right parenthesis end fraction mol space C O subscript 2 equals fraction numerator 22 space gram over denominator left parenthesis left parenthesis 1 cross times 12 space gram space mol to the power of negative sign 1 end exponent right parenthesis plus left parenthesis 2 cross times 16 space gram space mol to the power of negative sign 1 end exponent right parenthesis right parenthesis end fraction mol space C O subscript 2 equals fraction numerator 22 space gram over denominator 44 space gram space mol to the power of negative sign 1 end exponent end fraction mol space C O subscript 2 equals 0 comma 5 space mol  

Jadi mol 22 gram gas karbon dioksida adalah 0,5 mol.
 

3. Menghitung mol 54 gram air

mol space space H subscript 2 O equals fraction numerator massa space space H subscript 2 O over denominator M subscript r space space H subscript 2 O end fraction mol space space H subscript 2 O equals fraction numerator massa space C O subscript 2 over denominator left parenthesis left parenthesis 2 cross times A subscript r space H right parenthesis plus left parenthesis 1 cross times A subscript r O right parenthesis right parenthesis end fraction mol space space H subscript 2 O equals fraction numerator 54 space gram over denominator left parenthesis left parenthesis 2 cross times 1 space gram space mol to the power of negative sign 1 end exponent right parenthesis plus left parenthesis 1 cross times 16 space gram space mol to the power of negative sign 1 end exponent right parenthesis right parenthesis end fraction mol space H subscript 2 O equals fraction numerator 54 space gram over denominator 18 space gram space mol to the power of negative sign 1 end exponent end fraction mol space space H subscript 2 O equals 3 space mol   

Jadi mol 54 gram air adalah 3 mol.
 

4. Menghitung mol 30 gram etanol

mol space C subscript 2 H subscript 5 O H equals fraction numerator massa space C subscript 2 H subscript 5 O H over denominator M subscript r space C subscript 2 H subscript 5 O H end fraction mol space C subscript 2 H subscript 5 O H equals fraction numerator massa space C subscript 2 H subscript 5 O H over denominator left parenthesis left parenthesis 2 cross times A subscript r space C right parenthesis plus left parenthesis 6 cross times A subscript r H right parenthesis plus left parenthesis 1 cross times A subscript r O right parenthesis right parenthesis end fraction mol space C subscript 2 H subscript 5 O H equals fraction numerator 30 space gram over denominator left parenthesis left parenthesis 2 cross times 12 space gram space mol to the power of negative sign 1 end exponent right parenthesis plus left parenthesis 6 cross times 1 space gram space mol to the power of negative sign 1 end exponent right parenthesis plus left parenthesis 1 cross times 16 space gram space mol to the power of negative sign 1 end exponent right parenthesis right parenthesis end fraction mol space C subscript 2 H subscript 5 O H equals fraction numerator 30 space gram over denominator 46 space gram space mol to the power of negative sign 1 end exponent end fraction mol space space C subscript 2 H subscript 5 O H equals 0 comma 65 space mol    

Jadi mol 30 gram etanoladalah 0,65 mol.space 

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