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Calculate the total pressure in a 10 lit...

Calculate the total pressure in a 10 litre cylinder which contains 0.4 g He, 1.6 g `O_2` and 1.4 g `N_2` at `27^@C`. Also calculate the partial pressure of Helium gas in the cylinder. Assume ideal behaviour of gas (R=0.082 litre-atm `K^(-1)mol^(-1)`

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