Respuesta :

Maybe to see if the gas was safe to mammals and if not, what the effects were.

Answer:

Thus, in a confined space, candles were extinguished and mice died. Priestley believed his “pure air” enhanced respiration and caused candles to burn longer because it was free of phlogiston. For this reason, he called the gas that he obtained from decomposing mercury calx dephlogisticated air.

Explanation:

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