Forum klasy 2b gim
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3.40/47a) mNaCl=58,5 u23u --- 58,5u11,5g --- x gx=11.5*58,5/23=29,25b) mNaCl=58,5u35,5u --- 58,5u71g --- x gx=71*58,5/35,5=117g
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