We are asked to calculate the total pressure if we connect the two flasks

A 280-mL flask contains pure helium at a pressure of 753 torr . A second flask with a volume of 480 mL contains pure argon at a pressure of 723 torr .

If we connect the two flasks through a stopcock and we open the stopcock, what is the total pressure?

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What scientific concept do you need to know in order to solve this problem?

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