Answer:

Explanation:
Hello there!
In this case, when referring to single replacement reactions, it is crucial for us to figure out the formula of the starting reactants; thus, we know zinc is Zn and lead (IV) chloride is PbCl₄. In such a way, the reaction proceeds as follows:

Which must be balanced as shown below:

Regards!
Answer:
D
Explanation:
water freezes in cracks in rock
Answer:
yes answer os Na because it's electronic configuration is 1s^2,2s^2,2p^6,3s^1