I can get the answer on a cal. but I have to have the problem wrote out step by step. Help PLEASE :(

In a water treatment plant a dosage of alum is 35 parts per million. What is the grains per gallon dosage.

Try one of these. (http://www.google.com/search?num=100&hl=en&lr=&newwindow=1&safe=off&q=%22parts+per+million%22%22grains+per+gallon%22&btnG=Search)