What is the mass of

What is the mass of

(a) 6.02×1023 atoms of oxygen.

Ans: – The masses of oxygen are 16gm as 1 mole oxygen has this no of atoms

 

(b) 6.02×1023 molecules of P4.

Ans: – 31g phosphorus has this no of molecules so the total weight of P4 is 31×4=124.

 

(c) 3.01×1023 molecules of O2.

Ans: – 1 mole O2 has 16g of oxygen so this no of molecules has 0.5 mole or 8gm of molecules.

 

 

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