6.5L of the final volume <was><were> used


New Member
Portuguese - Portugal

I'd really appreciate if someone could provide an explanation for the following:

Which of the phrases is correct?

" ... 6.5L of the final volume was used..." or "... 6.5L of the final volume were used..."

What is the subject, 6.5L or final volume? To which should the verb relate to?

Thanks in advance!
  • Mister Micawber

    Senior Member
    USA, English
    The subject is 6.5 liters, and you can consider that either as a single lump quantity or as several countable liters. Either verb is grammatically acceptable.