They are always in motion<span />
When HCl is added to a saturated solution of PbCl2, the solubility of PbCl2 would decrease so precipitation would occur. The decrease in the solubility is due to the common ion effect or the presence of Cl- ions in both compounds.
The answer is C :
It controls the entry and exit of substances.
Answer:
I think this is like a game in which you need dice.
Explanation:
To fill out the second page, you need to complete the roll/go-to chart.
