How many litres of 25% (mass/volume) copper sulphate solution would take to get 85g of copper

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Idon’t know how to solve this question

Drug abuse will not lead to physical and psychological dependence. true or false ?