1.

Calculate the mass of a single atom of sulphur and a single molecule of carbon dioxide.

Answer»

Solution :Gram -atomic mass of SULPHUR =32g
Mass of one sulphur atom `=("gram atomic mass")/(6.02xx10^(23))`
`=(32)/(6.02xx10^(23))=5.33xx10^(-23)g`
Formula of carbon dioxide `=CO_(2)`
Molecular mass of `CO_(2)=12+2xx16=44`
Gram-molecular mass of `CO_(2)=44g`
Mass of one molecular of `CO_(2)=("Gram molecular mass")/(6.022xx10^(23))`
`=(44)/(6.02xx10^(23))=7.308xx10^(-23)g`.


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