ACS Chemistry Practice Exam 2025 – The All-in-One Guide to Exam Success!

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How many kilopascals are in one atmosphere?

100.0 kPA

101.325 kPA

One atmosphere is defined as being equal to 101.325 kilopascals. This measurement is based on the standard atmospheric pressure at sea level. The kilopascal is a unit of pressure that is part of the International System of Units (SI), and it is used widely in various scientific fields, including chemistry.

The value of 101.325 kPa is derived from the barometric pressure and has been accepted as a standard reference point. It is important in calculations involving gases and in understanding concepts such as the ideal gas law, where pressure plays a crucial role.

The other values provided in the options do not correspond to the accepted value for one atmosphere, which emphasizes the need to reference reliable standards when discussing measurements in chemistry.

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1.01325 kPA

102.0 kPA

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