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mylen [45]
3 years ago
8

SELECT ALL THAT APPLY!! Which of the following are considered SIGNS that a chemical reaction occurred?

Physics
1 answer:
MAXImum [283]3 years ago
8 0

Answer:

Formation of a Precipitate

Unexpected Color Change

Formation of a Gas

Explanation:

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Please help.
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<em>math</em><em>ematically</em><em>,</em>

<em>kinetic \: energy \:  =  \frac{1}{2} m {v}^{2}</em>

<em>wher</em><em>e</em><em> </em><em>m</em><em>=</em><em> </em><em>mass</em>

<em>and</em><em> </em><em>v</em><em>=</em><em>veloc</em><em>ity</em>

<em>giv</em><em>en</em><em> </em><em>that</em><em>,</em><em> </em>

<em>kinet</em><em>ic</em><em> energy</em><em>=</em><em>4</em><em>9</em><em>3</em><em>9</em><em>0</em><em>0</em><em>J</em>

<em>mass</em><em> </em><em>=</em><em>5</em><em>0</em><em>4</em><em>0</em><em>k</em><em>g</em>

<em>maki</em><em>ng</em><em> </em><em>velo</em><em>city</em><em> </em><em>the</em><em> </em><em>su</em><em>bject</em>

<em>v =  \sqrt{ \frac{2 \times kinetic \: energy}{mass} }</em>

<em>sub</em><em>stitute</em><em> </em><em>the</em><em>ir</em><em> </em><em>valu</em><em>es</em><em> </em><em>in</em><em> </em><em>the</em><em> </em><em>formu</em><em>la</em>

<em>v =  \sqrt{ \frac{2 \times 493900}{5040} }</em>

<em>v =  \sqrt{ \frac{987800}{5040} }</em>

<em>v =  \sqrt{196}</em>

<em>v = 14m {s}^{ - 1}</em>

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