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TUGAS KIMIA DASAR 1

TUGAS KIMIA DASAR 1. Oleh : Destina Prabasiwi (K3313021). SOAL. Elektron terakhir dari unsur logam X mempunyai bilangan kuantum n = 3, l = 2, m = +2, s = -⅟ 2.

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TUGAS KIMIA DASAR 1

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  1. TUGASKIMIA DASAR 1 Oleh : DestinaPrabasiwi (K3313021)

  2. SOAL Elektronterakhirdariunsurlogam X mempunyaibilangankuantum n = 3, l = 2, m = +2, s = -⅟2. Jika 6,5 gram logam X direaksikandengan H2SO4samapaihabisbereaksiternyatadihasilkansenyawa XSO4dan gas H2 sebanyak 2,24 liter padakeadaan STP, makajumlah neuron yang terkandungdalamunsur X adalah…

  3. OPSI JAWABAN • 30 • 34 • 35 • 50 • 75

  4. JAWAB Diket. : n = 3 l = 2 m = +2 s = -⅟2

  5. Konfigrasielektron = [ Ar] 4s 2 . 3d10 • Nomor atom = 30 X2+ + H2SO4 XSO4 + H2 mol H2 = 2,24 22,4 = 0,1 Karenajumlahkoefisien X = jumlahkoefisien H2 Makajumlah mol X = jumlah mol H2 = 0,1

  6. Mol = massa Mr 0,1 = 6,5 Mr Mr = nomormassa = 6,5 0,1 = 65 Neutron = nomormassa – nomor atom = 65 – 30 = 35 ( C )

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