Thursday
March 23, 2017

Post a New Question

Posted by on Saturday, September 7, 2013 at 7:41am.

If 23.7g of C8H18 are combusted, what mass of water will be produced?

  • Chemistry - , Saturday, September 7, 2013 at 8:08am

    First establish the combustion equation and have it balanced:
    C8H18 + O2 -> 8CO2 + 9H2O.
    Balances for C, but not for O.
    Since there are 16+9=25O on the right, we need to double the number to make the number of molecules on the left a whole number. So it becomes:
    2C8H18 + 25O2 -> 16CO2 + 18H2O.

    Next step is to observe the relative molecular masses in 8H18 and 18H2O.

    You can then calculate the mass of H2O produced by proportions using 23.7g of octane.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question