What are good science fair experiments? They should be things we don't know the outcome to yet. If I could have some ideas soon, that would be great. THX!!

How manyatoms of mercury are in 1.4214e+1 ml sample

Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution

State one important difference between a physical change and a chemical change?