Balanced or Unbalanced? Write a “B” for Balanced and a “U” for Unbalanced. ______ 11.CH4 + O2 à CO2 + 2 H2O ______ 12. NaBr +

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Balanced or Unbalanced? Write a “B” for Balanced and a “U” for Unbalanced.
______ 11.CH4 + O2 à CO2 + 2 H2O
______ 12. NaBr + CaF2 à NaF + CaBr2
______ 13. 4 Fe + 3 O2 à 2 Fe2 O3

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Gerda 7 months 2021-07-11T13:52:10+00:00 1 Answers 4 views 0

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    2021-07-11T13:53:46+00:00

    11. U
    12. U
    13. B
    Good luck!

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )