A 100-milliliter sample of oxygen and a 200-milliliter sample of hydrogen each
have a pressure of 75 kPa and a temperature of 290 K. Both samples are added
to an empty 300-milliliter container. What is the partial pressure, in kPa, of the
oxygen in the 300-milliliter container?
15 kPa
25 kPa
30 kPa
45 kPa