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I need a good high school level science project that I can do a lot of research on and have a control http://www.google.com/search?q=science+fair+project&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official Umpteen ideas for you in he...

What is the percent bromine in a compound made of 1g of hydrogen and 80g bromine?

Find the value of this expression. 2/7 times 42/45 plus 2/5 times 11/3