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O2 is generated into a 250ml beaker by water displacement

1) O2 is generated into a 250mL beaker by water displacement at a pressure of 730 torr and a temperature of 25C. What is the volume O2 at STP?

2) A 97.6 mL sample of hydrogen gas is collected by water displacement at 20C. The atmospheric pressure in the laboratory is measured to be 771.5 torr. How many milligrams of hydrogen does the sample contain?

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Chemistry: O2 is generated into a 250ml beaker by water displacement

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