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 0.708 g cm⁻³.

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p/atm 0.050 V/cm³ 1.22 0.100 1.33 0.150 1.31 0.200 1.36 0.250 1.40