A) Hg, or Mercury, is a liquid at room temperature. Hope this helps!!
Answer:

Explanation:
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In this case, since the molar mass of the empirical formula is:

Thus, the ratio of the molecular to the empirical formula is:

Thus, the molecular formula is six times the empirical formula:

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The answer to this would be d. Precipitation patterns .
Answer:
Scientist use GPS satellites and movement tracers.
Explanation: