1.

Calculate the number of atoms of oxygen and carbon in 5 moles of CO_(2).

Answer»

Solution :`"1 mole of "CO_(2)" contains 2 moles of OXYGEN"`
`"5 moles of "CO_(2)" contain 10 moles of oxygen"`
`"Number of atoms of oxygen"="Number of moles of oxygen"XX"Avogadro.s number"`
`=10xx6.023xx10^(23)`
`=6.023xx10^(24)" atoms of Oxygen"`
`"1 mole of "CO_(2)" contains 1 mole of carbon"`
`"5 moles of "CO_(2)" contains 5 moles of carbon"`
`"No. of atoms of carbon"="NUMBR of moles of oxygen"xx"Avogadro.s number"`
`=106.023xx10^(23)`
`=6.023xx10^(24)"atoms of Oxygen"`
`"1 mole of "CO_(2)" contains 1 mole of carbon"`
`"5 moles of "CO_(2)" contains 5 moles of carbon"`
`"No. of atoms of carbon"="No. of moles of carbon"xx"Avogadro.s number"`
`=5xx6.023xx10^(23)`
`=3.011xx10^(23)" atoms of Carbon"`


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