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VladimirAG [237]
4 years ago
6

Which is evidence that a chemical reaction has occurred? A) a phase change occurs B) a new gas is observed in the form of bubble

s C) red and yellow paint mixing to make orange paint D) the temperature of the substance remains constant
Chemistry
1 answer:
sweet [91]4 years ago
7 0

Answer:

I think A) a phase change occurs

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Answer:

A. Gas atoms subjected to electricity emit bright lines of light

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When subjected to electricity, the electrons of a gas atom are <em>excited</em>. From that excited energy level, the electrons eventually go back to their initial state; this <u>transition</u> is done by emitting photons at a specific wavelength (causing an emission of bright lines of light).

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