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Find : (i) No.of moles in 10^(20) atoms ...

Find : (i) No.of moles in `10^(20)` atoms of `Cu`
(ii) Mass of `200_(8)^(16)O` atoms in amu
(iii) Mass of `100` atoms of `_(7).^(14)N` in gm
(iv) No.of molecules & atoms in `54 gmH_(2)O`
(v) No.of atoms in `88gmCO_(2)` .

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Find : (i) No.of moles in 10^(20) atoms of Cu (ii) Mass of 200_(8)^(16)O atoms in amu (iii) Mass of 100 atoms of N in gm (iv) No.of molecules & atoms in 54 gmH_(2)O (v) No.of atoms in 88gmCO_(2) .

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