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Calculate the total pressure in bar in a...

Calculate the total pressure in bar in a mixture of 8g of `O_2` and 4g of `H_2` confined in a vessel of `1dm^3` at `27^@C`.

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Number of moles of `O_2` = 8/32 = 0.25
Number of moles of `H_2` = 4/2 = 2
Total number of moles = 2.25
P = nRT/V = `(2.25xx0.083xx300)/1` = 56.025 bar
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