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16 February, 08:35

What mass, in grams, of oxygen gas (o2) is contained in a 8.5-liter tank at 32.0 degrees celsius and 3.23 atmospheres?

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  1. 16 February, 08:43
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    For this problem we assume that oxygen is an ideal gas. So, we use the equation PV=nRT where P is pressure, V is the volume, n is the number of moles, R is a universal constant and T is the temperature. We first solve for the number of moles n. Then, using the molar mass of oxygen we convert it to grams.

    PV=nRT

    n = PV / RT

    n = 3.23 (8.5) / 0.08206 (32+273.15)

    n = 1.0964 mol

    mass = 1.0964 mol (32g / 1 mol) = 35.09 g O2
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