Answer :
Final answer:
The atmospheric gas mixture exerts a pressure of approximately 101.3 kilopascals (kPa) on the Earth's surface at sea level.
Explanation:
The atmospheric gas mixture exerts a pressure of approximately 101.3 kilopascals (kPa) on the Earth's surface at sea level.
On average, the atmospheric pressure at sea level is 1.01 × 105 pascals, or 1010 millibars, which is equivalent to 101.3 kilopascals or 1 atmosphere (atm).
This pressure is due to the weight of the column of air above a 1.0 m² section of the Earth's surface, which weighs about 10,000 kg. The pressure decreases with increasing altitude as the atmosphere becomes less dense.
