What are some properties that can be used to determine a chemical reaction has occurred?

Question

What are some properties that can be used to determine a chemical reaction has occurred?

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Gia Bảo 6 months 2021-07-15T03:14:33+00:00 2 Answers 4 views 0

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    0
    2021-07-15T03:15:43+00:00

    Answer:

    Change in Color

    Heat is released (bubbles in solution)

    Sometimes even a change in texture

    A new smell

    Formation of a precipitate

    0
    2021-07-15T03:15:51+00:00

    Answer:

    Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

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