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1.what happens when hydrogen is ignited in the presence of oxygen (9 letters)
2. Sherlock found that the poison was ______(8 letters)
3. a reaction that always involves combining with oxygen (10 letters)
4. the "real" formula(9 letters)
5. a method of decomposing water(12letters)

Hi Christina.

Rather than post the same questions over several threads, why not use your other thread for these chemistry questions ...http://www.crosswordsolver.org/forum/96481/chemistry-worksheet">click here. This might keep focus.

Also, why not bounce ideas off other students via e-mail, msg, phone, twitter or txt (or even, dare I say it, face-to-face)?

JimC
P.S. When someone gives an answer you could always check it out to understand if & why it's the right answer.