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Question

What is the number of molecules in each of 32g O2 and 44 CO2?

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Solution

Given mass of O2 = 32g
Mole = Given massMolecular mass= 3232= 1mol
Mole = Number of molecules(N)Avogadro number
N = Mole ×NA
N = 1 ×6.022×1023 molecules

Given mass of CO2 = 44g
Mole = 4444=1mol
N = Mole ×NA
N = 1 ×6.022×1023 molecules

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