How much thermal energy is produced by burning two moles of octane?

The molecular weight of n-Octane is 114.230, so 2g of moles is 228.46 g. 
(5,470,706 J/g-mol)(2 g-mol)= 10,941,412 Joules

Betray, destroy, and obey do not need to be changed to add the suffix -ed, because the "y" at the end of each word is preceded by a vowel  (so  they would be spelled  "betrayed," "destroyed," and "obeyed").

but hurry is different; it has to  be spelled "hurried" because the "y" at the end of "hurry" is preceded by a consonant.

It would be b) culture (brainliest answer )