The mass percentage is 15.1465%.
Answer:
c
Explanation:
when the river is affected by the acid rain many species go into extinction
<span> The atomic number increases by one and the element becomes a different element. </span>
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. ... Cold water is more dense and will sink in room-temperature water.
