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No. Of P4molecules in 0.5 moles = 6.022 × 10 ^23/2
No. Of P atoms = 6.022 *10^23/2×4
= 6.022 * 10^23*2
No. Of atoms in one mole of P=6.022*10²³
So, no. Of moles in P would be = 2
At last the mass of P atoms present = 2* the mass of one mole of P
=2*31=62g
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