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Di antara zat berikut yang -nya paling besar adalah .... Na = 23; C = 12; O = 16; H = 1; AI = 27; S = 32; Fe = 56

Pertanyaan

Di antara zat berikut yang M subscript r-nya paling besar adalah ....

A subscript r Na = 23; C = 12; O = 16; H = 1; AI = 27; S = 32; Fe = 56space

  1. Na subscript 2 C O subscript 3space

  2. Fe subscript 2 open parentheses S O subscript 4 close parentheses subscript 3space

  3. Al subscript 2 open parentheses S O subscript 4 close parentheses subscript 3space

  4. C subscript 12 H subscript 22 O subscript 11space

  5. C subscript 6 H subscript 12 O subscript 6space

Pembahasan Soal:

Untuk dapat mengetahui senyawa yang memiliki M subscript r terbesar, perlu dihitung M subscript r untuk masing-masing senyawa.


M subscript r space Na subscript 2 C O subscript 3 equals open parentheses 2 cross times A subscript r space Na close parentheses plus A subscript r space C plus open parentheses 3 cross times A subscript r space O close parentheses M subscript r space Na subscript 2 C O subscript 3 equals open parentheses 2 cross times 23 close parentheses plus 12 plus open parentheses 3 cross times 16 close parentheses M subscript r space Na subscript 2 C O subscript 3 equals 46 plus 12 plus 48 M subscript r space Na subscript 2 C O subscript 3 equals bold 106 bold space italic g bold forward slash bold mol

M subscript r space Fe subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals open parentheses 2 cross times A subscript r space Fe close parentheses plus open parentheses 3 cross times A subscript r space S close parentheses plus open parentheses 12 cross times A subscript r space O close parentheses M subscript r space Fe subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals open parentheses 2 cross times 56 close parentheses plus open parentheses 3 cross times 32 close parentheses plus open parentheses 12 cross times 16 close parentheses M subscript r space Fe subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals 112 plus 96 plus 192 M subscript r space Fe subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals bold 400 bold space italic g bold forward slash bold mol

M subscript r space Al subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals open parentheses 2 cross times A subscript r space Al close parentheses plus open parentheses 3 cross times A subscript r space S close parentheses plus open parentheses 12 cross times A subscript r space O close parentheses M subscript r space Al subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals open parentheses 2 cross times 27 close parentheses plus open parentheses 3 cross times 32 close parentheses plus open parentheses 12 cross times 16 close parentheses M subscript r space Al subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals 54 plus 96 plus 192 M subscript r space Al subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 equals bold space bold 342 bold space italic g bold forward slash bold mol

M subscript r space C subscript 12 H subscript 22 O subscript 11 equals open parentheses 12 cross times A subscript r space C close parentheses plus open parentheses 22 cross times A subscript r space H close parentheses plus open parentheses 11 cross times A subscript r space O close parentheses M subscript r space C subscript 12 H subscript 22 O subscript 11 equals open parentheses 12 cross times 12 close parentheses plus open parentheses 22 cross times 1 close parentheses plus open parentheses 11 cross times 16 close parentheses M subscript r space C subscript 12 H subscript 22 O subscript 11 equals 144 plus 22 plus 176 M subscript r space C subscript 12 H subscript 22 O subscript 11 equals bold 342 bold space italic g bold forward slash bold mol

M subscript r space C subscript 6 H subscript 12 O subscript 6 equals open parentheses 6 cross times A subscript r space C close parentheses plus open parentheses 12 cross times A subscript r space H close parentheses plus open parentheses 6 cross times A subscript r space O close parentheses M subscript r space C subscript 6 H subscript 12 O subscript 6 equals open parentheses 6 cross times 12 close parentheses plus open parentheses 12 cross times 1 close parentheses plus open parentheses 6 cross times 16 close parentheses M subscript r space C subscript 6 H subscript 12 O subscript 6 equals 72 plus 12 plus 96 M subscript r space C subscript 6 H subscript 12 O subscript 6 equals bold 180 bold space italic g bold forward slash bold mol
 

Dari hasil perhitungan diperoleh Fe subscript 2 open parentheses S O subscript 4 close parentheses subscript 3 memiliki M subscript r paling besar dibanding yang lain.

Jadi, jawaban yang tepat adalah B.space

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 04 Mei 2021

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