December 2018 1 137 Report
Scrie si egaleaza urmatoarele reactii chimice. Denumeste compusii care se obtin.
Fe+O2=
Fierul trebuie sa aiba ambele valente.
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Asemanari si deosebiri intre satul medieval si cel de astazi.
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Exercitiile 6, 7, 11 si 12. Nu inteleg chimia absolut deloc si am ff multe teme de terminat :,)

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