The following data have been obtained for the adsorption of H₂ on the surface of 1.00 g of copper at 0 °C. The volume of H2 below is the volume that the gas would occupy at STP (0 °C and 1 atm).

Determine the volume of H₂ necessary to form a monolayer and estimate the surface area of the copper sample. The density of liquid hydrogen is 0.708g cm⁻³.  

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p/atm V/cm³ 0.050 23.8 0.100 13.3 0.150 8.70 0.200 6.80 0.250 5.71