What would be the formula for diphosphorus pentoxide?

Here’s my thought process:

  • From name: phosphorus ##->## ##”P”##
  • “di” ##->## ##2##
  • From name: oxide ##->## ##”O”##
  • Anion stem: “ox”
  • “pent” (instead of “penta”, since “ox” starts with a vowel) ##->## ##5##

##->## ##”P”_2″O”_5## (empirical formula)


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