1.

The moleculeformulaP_(2)O_(5)meansthat:

Answer»

A moleculecontains 2atomsofPand5atomsof O
The RATIOOF themassof Pto themassof O INTHE moleculeis2:5
Thereare twiceas manyP atomsin themolecule asthereare O atoms
The ratioof the massof Pto themassof O inthe MOLECULE is 5 :2

Answer :A


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