When two solutions are combined, what evidence would show a chemical reaction has occurred? * temperature remains constant

Question

When two solutions are combined, what evidence would show a chemical
reaction has occurred? *
temperature remains constant
a precipitate forms
volume increases

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Dâu 1 year 2021-09-04T01:08:46+00:00 2 Answers 5 views 0

Answers ( )

    0
    2021-09-04T01:09:52+00:00

    a precipitate forms because when a chemical change occurs a new substance is formed.

    0
    2021-09-04T01:10:35+00:00

    The presence of chemical reaction can be detected by formation of precipitate.

    hence, the correct answer is

    =》a precipitate forms

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