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  • Normal atmospheric pressure is equal to ______ of mercury...
Multiple choice

Normal atmospheric pressure is equal to ______ of mercury column.

  1. 76 mm

  2. 760 cm

  3. 76 cm

  4. 176 cm

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Standard atmospheric pressure at sea level is 76 cm of mercury column, which equals 760 mm Hg. This is the basis of the pressure unit 'one atmosphere' used in physics and chemistry.

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