Anyone who can solve this please 40 points

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

Is it safe to take 450mg of diphenhydramine hydrochloride?

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing