1.

The total number of atoms of all elements present in mole of ammonium dichromate is

Answer»

19
`6.023xx10^(23)`
`114.473xx10^(23)`
`84.322xx10^(23)`

Solution :AMMONIUM dichromate is `(NH_(4))_(2)Cr_(2)O_(7)`
1 mole of it CONTAINS of 2 moles of N atoms,
8 moles of H atoms,2 moles of Cr atoms and 7 moles of O-atoms.
`therefore " TOTAL atoms ofall elements "=2+8+2+7`
`="19 moles"=19xx6.023xx10^(23)" atoms"`
`=114.437xx10^(23)`


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