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In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical change occurs. A chemical mechanism is a theoretical conjecture that tries to describe in detail what takes place at each stage of an overall chemical reaction.
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b. nitrogen
c. methane
d. water vapor
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Uhh..Because as you get farther away then you cant hear the sound waves i think
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because the sound waves can only travel so far and if there is things near the source the waves bounce off of it. Ex: the speaker in the class room wouldn't be quiet, its like the noise went away as i walked down the halls, maybe the walls were blocking the noise
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