The molecular formula \[{{P}_{2}}{{O}_{5}}\] means that

• A. a molecule contains 2 atoms of P and 5 atoms of O
• B. the ratio of the mass of P to the mass of O in the Molecules is 2:5
• C. there are twice as many P atoms in the molecule as there are O atoms
• D. the ratio of the mass of P to the mass of 0 in the molecule is 5 : 2