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To calculate the volume occupied by 55 g of methane (CH4) at STP (Standard Temperature and Pressure), we first need to determine the number of moles of methane. The molar mass of methane is 16 g/mol. Therefore, 55 g of methane is equal to 55 g / 16 g/mol ≈ 3.44 mol. At STP, 1 mol of any gas occupies approximately 22.4 L. Therefore, 3.44 mol of methane would occupy approximately 3.44 mol x 22.4 L/mol ≈ 77.1 L.

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