For the 1-hour average value, a city reports 0.17 ppm ozone. the permissible limit is 0.12 ppm ozone. by what amount in ppm does the report value exceed the permissible limit? this exceeded amount is what percentage of the permissible level?

How can you write e method for the experiment of separating sand from water by filtration process? 1-materials 2-steps 3-conclusion also the same for the separating process of water and salt by filtration or distillation. quick because i need to finish my hw