What is the number of molecules of 5 gm CO2 and how ?

What is the number of molecules of 5 gm CO2 and how ?
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Answer :

44gm contains CO2 atoms = 6.023x1023 . '.1 gm contains CO2 atoms = 6.023x1023 / 44 = 1.37x1022 . .5gm CO2 contains atoms = 1.37x1022 * 5 = 6.84x1022 Therefore , the number of atoms in 5gm CO2 is 6.84x1022 (e.g.)
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