Answer:
f) is the answer please thanks
Answer: single replacement reaction, ![3Sr+2Al(ClO_3)_3\rightarrow 3Sr(ClO_3)_2+2Al](https://tex.z-dn.net/?f=3Sr%2B2Al%28ClO_3%29_3%5Crightarrow%203Sr%28ClO_3%29_2%2B2Al)
Explanation:
A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.
A general single displacement reaction can be represented as :
![XY+Z\rightarrow XZ+Y](https://tex.z-dn.net/?f=XY%2BZ%5Crightarrow%20XZ%2BY)
As strontium metal is added to aluminum chlorate , strontium being more reactive than aluminium, displaces aluminium atom its salt solution and lead to formation of strontium chlorate and aluminum metal.
![3Sr+2Al(ClO_3)_3\rightarrow 3Sr(ClO_3)_2+2Al](https://tex.z-dn.net/?f=3Sr%2B2Al%28ClO_3%29_3%5Crightarrow%203Sr%28ClO_3%29_2%2B2Al)
They are very stable (not reactive).
This is because their outer shell has a total of 8 valence electrons. All elements strive to get towards a full outer shell, but since these elements already have a full outer shell, they are fairly unreactive.
I'm not sure what type of fuel you're talking about. If you mean fossil fuel then kerosene has the highest density of all of the things you listed.