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Jumlah mol dari 2,495 gram CuSO 4 .5H 2 O (Ar Cu = 63,5, O = 16, S = 32, H = 1) adalah….

Jumlah  mol  dari  2,495  gram CuSO4 .5H2O (Ar Cu = 63,5, O = 16, S = 32, H = 1) adalah….

  1. 0,01 mol

  2. 0,02 mol

  3. 0,1 mol

  4. 0,15 mol

  5. 0,25 mol

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S. Susanti

Master Teacher

Mahasiswa/Alumni Universitas Jayabaya

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Pembahasan

M r space C u S O subscript 4 space.5 H subscript 2 O equals space open parentheses 1 cross times A r space C u close parentheses space plus open parentheses 1 cross times space A r space S close parentheses space plus space 4 cross times A r space O right parenthesis space plus space 10 cross times A r space H right parenthesis space plus space 5 cross times A r space O right parenthesis space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space open parentheses 1 cross times 63 comma 5 space close parentheses plus space open parentheses 1 cross times 32 close parentheses space plus space open parentheses 4 cross times 16 close parentheses space plus space open parentheses 10 cross times 1 close parentheses plus open parentheses 5 cross times 16 close parentheses space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 249 comma 5 space  m o l space Na subscript 2 SO.5 straight H subscript 2 straight O space equals fraction numerator m a s s a space space Na subscript 2 SO.5 straight H subscript 2 straight O over denominator M r space Na subscript 2 SO.5 straight H subscript 2 straight O space end fraction equals fraction numerator 2 comma 495 over denominator 249 comma 5 end fraction equals 0 comma 01 space m o l

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