A student measures the mass of an iron nail to be 25 grams. The student heats the nail over a bunsen burner and measures the mass of the nail afterwards. The mass of the nail is found to be greater after burning. Which of the following best explains the increase in mass of the nail? 1. Some of the heavier particles multiplied inside the nail. 2. Extra particles from the air were added to the nail during burning. 3. The reaction gave off less heat than was added. 4. The heat caused the compound to become more dense.
A student measures the mass of an iron nail to be 25 grams. The student heats the nail over a bunsen burner and measures the mass of the nail afterwards. The mass of the nail is found to be greater after burning. Which of the following best explains the increase in mass of the nail?
A student measures the mass of an iron nail to be 25 grams. The student heats the nail over a bunsen burner and measures the mass of the nail afterwards. The mass of the nail is found to be greater after burning. Which of the following best explains the increase in mass of the nail?
1. Some of the heavier particles multiplied inside the nail.
2. Extra particles from the air were added to the nail during burning.
3. The reaction gave off less heat than was added.
4. The heat caused the compound to become more dense.
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