Aluminum can preserve food and drinks longer than iron can. If oxygen combines with the iron the iron will rust and the food or drink inside will not be good to eat anymore and you will have to waste it.
Answer:
there are 2970000cm in 29.7km
Explanation:
The reaction is a substitution reaction since bromide ion was replaced by hydroxide ion.
<h3>What is a chemical reaction?</h3>
A chemical reaction is a change which results in a the permanent rearrangements of the atoms and constituents of a substance such that new substances are formed.
The given reaction is a as follows:

Bromide ion was replaced by hydroxide ion.
Therefore, the reaction is a substitution reaction.
Learn more about chemical reactions at: brainly.com/question/16416932
The answer would be the third one listed, Refraction
A heterogeneous mixture because you can still tell apart the components in the mixture. You can differentiate between the milk and the cereal.