In Science / Senior High School | 2024-09-01

2. What cause the rusting of iron nails or iron made materials in a wet cloth?A. Presence of heatB. Absence of heatC. Presence of oxygenD. Absence of oxygen3.when candles was lighted it melted into liquid and became solid again after few seconds or in minute .what causes these changes?1.presence of heat 2.presence of oxygen 3.absence of oxygen4.absence of oxygen A.1-2 and 3B.1 and 4C.1 and 2D.all of the above ​

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