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Physics, 25.07.2021 01:00 frenchpotaetoes2832

At a pressure of 2.0 atm, a gas tank contains 5.0 kg of hydrogen gas at a constant temperature. The hydrogen gas was then replaced with 12.0 kg of oxygen gas. Find

i. the amount of hydrogen and oxygen gas in moles

(Given, O = 16; H = 1; R = 8.315 J/mol. K)​
ii. the pressure exerted by oxygen gas.

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