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“It’s not cheating if you use it to understand ,” her mother said gently, handing her the worn-out copy of along with its solution guide.
Maya didn’t have 3 days, but she had a lightbulb moment: The rust isn’t just “damage.” It’s a new substance that captured invisible oxygen from the air.
Instead of just copying the answer, she read the carefully: Solution hint: In rusting, iron (Fe) from the nail combines with oxygen (O₂) from the air and water vapor to form hydrated iron(III) oxide (Fe₂O₃·xH₂O). The rust includes the original iron plus the added oxygen. Therefore, the total mass of the rusted nail is greater than the original nail. Then, Viraf J. Dalal’s book had a "Try This" box: Perform an activity – weigh a clean iron nail, leave it in moist cotton for 3 days, weigh again.
Maya reluctantly opened to . She found the exact question: “Q. 4(c) – Explain with an example why the mass increases in some chemical changes.”
“It’s not cheating if you use it to understand ,” her mother said gently, handing her the worn-out copy of along with its solution guide.
Maya didn’t have 3 days, but she had a lightbulb moment: The rust isn’t just “damage.” It’s a new substance that captured invisible oxygen from the air. viraf j dalal chemistry class 8 icse solutions
Instead of just copying the answer, she read the carefully: Solution hint: In rusting, iron (Fe) from the nail combines with oxygen (O₂) from the air and water vapor to form hydrated iron(III) oxide (Fe₂O₃·xH₂O). The rust includes the original iron plus the added oxygen. Therefore, the total mass of the rusted nail is greater than the original nail. Then, Viraf J. Dalal’s book had a "Try This" box: Perform an activity – weigh a clean iron nail, leave it in moist cotton for 3 days, weigh again. “It’s not cheating if you use it to
Maya reluctantly opened to . She found the exact question: “Q. 4(c) – Explain with an example why the mass increases in some chemical changes.” The rust includes the original iron plus the added oxygen
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