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3. 495 cm3 of oxygen gas at 25 oC and 114,700 Pa, and 877 cm3 of...

3. 495 cm3 of oxygen gas at 25 oC and 114,700 Pa, and 877 cm3 of nitrogen gas 25.0 °C and 114,700 Pa, are injected into an evacuated 536 cm3 flask.
a. Find the number of moles of oxygen present prior to mixing the gases, assuming the temperature remains constant, and that oxygen is an ideal gas. (5pts)

b. Find the number of moles of nitrogen present prior to mixing the gases, assuming the temperature remains constant and that nitrogen is an ideal gas. (5pts)

1.
c. Find the total pressure of oxygen and nitrogen in the flask (after the two gases are mixed together. (7pts)

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