One atmosphere corresponds to how many millimeters of mercury?

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Multiple Choice

One atmosphere corresponds to how many millimeters of mercury?

Explanation:
Standard atmospheric pressure is defined by a mercury column of 760 millimeters at sea level and 0°C, so 1 atmosphere equals 760 mmHg. That’s why 760 is the right choice. The other numbers come from related but different units: 29.92 is inches of mercury, not millimeters; 1013 is millibars (hPa); and 720 is just a distractor.

Standard atmospheric pressure is defined by a mercury column of 760 millimeters at sea level and 0°C, so 1 atmosphere equals 760 mmHg. That’s why 760 is the right choice. The other numbers come from related but different units: 29.92 is inches of mercury, not millimeters; 1013 is millibars (hPa); and 720 is just a distractor.

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