Question

(SP) 1. Cate grame de hidrogen se degaja din reactia a 4 moli de K' cu HCI 35,5; Au-1: Ak-39; Ac



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Answer 1

Răspuns:

MK=39g/mol

n=m/M

m=n×M=4×39=156g K

MH2=2×1=2g/mol

2x39g...............................2g

2K + 2HCl => 2KCl + H2

156g...............................yg

y=156×2/2×39=4g H2