The larger the piece the longer it will take to break down. This is because it has more mass that needs to be broken down.
True. Its like when you're think of the word you want to say but you forget what the word is.
The answer is 329. Because 273 + 56 = 329.
FeO + Al -> AlO + Fe
As you can see, this type of reaction would lead to be a Single Placement (or Replacement) reaction!
Hope this helps! Best wishes!