Контрольна робота з хімії 7 клас І семестр

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    CH4
    NH3
    PH3
    SiH4
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    H2S
    HCl
    H2O
    H2Se
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    Al2O3
    CO2
    ZnO
    Li2O
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    Na2O
    CuO
    N2O3
    Fe3O4
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