Why does acid precipitation weather rocks faster then normal precipitation

Which of the following represents an upside-down image?

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units

Explain what will happen if decomposers were apsent from a forest ecoysystem.