Answer:
1.
Explanation:
Hello,
In this case, for the given reaction we first assign the oxidation state for each species:

Whereas the half reactions are:

Next, we exchange the transferred electrons:

Afterwards, we add them to obtain:

By adding and subtracting common terms we obtain:

Finally, by removing the oxidation states we have:

Therefore, the smallest whole-number coefficient for Sn is 1.
Regards.
It becomes a liquid with the water
It should be <em>Ultraviolet rays </em>because they are moderate in energy.
Base+salt > acid +alkali > neutralization i think this is the reaction