# chemistry

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a mixture of gases at a total pressure of 95kPa contains carbon dioxide, oxygen, and nitrogen. The partial pressure of the carbon dioxide is 48kPa and the partial pressure of the nitrogen is 24kPa. What is the partial pressure of the oxygen?

• chemistry -

Dalton's Law of partial pressures says that each gas of a mixture exerts its partial pressure independent of the others; i.e., the sum of the partial pressures is the total pressure of the system. Therefore,
total P = PN2 + PCO2 + PO2

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