Is the formula for mercurous phosphate (or mercury (i) phosphate) (hg2)3(po4)2 or hg3po4? i have looked it up on the internet and i have seen it both ways.

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