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3. Jessica was investigating the rusting of iron. She set up five experiments as shown below and left the test-tubes for three days. ㅂ iron nail in distilled water iron nail in tap water which has been boiled to remove dissolved gases E iron nail in vinegar iron nail in sea water Jessica wrote the following results in her book. iron nail and a chemical to absorb water vapour observation Test-tube A nail slightly rusty B nail still shiny nail still shiny CDE nail very rusty nail slightly rusty, bubbles of gas seen Explain why the nails had not rusted I. test tubes B and C
Sagot :
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