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a) pV = nRT so n (number of moles) = pV/RT = 1.013x10^5Pa*2.6x10^-6m^3/(8.314*(273+20... = 1.08x10^-4moles so there are 1.08x10^-4*6.022x10^23molecules/mole = 6.51x10^19 molecules b)n (number of moles) = pV/RT = 2.6x10^-11Pa*2.6x10^-6m^3/(8.314*(273+20... = 2.78x10^-20mole
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