Question

chemical between pencil and eraser​

Answer 1

Answer:

Enter hardware merchant-turned-chemical engineer Charles Goodyear, who, after several years of work, developed the vulcanization process to cure rubber in 1839. During vulcanization, sulfur is added to rubber and the mixture is heated under pressure to form sulfur cross-links between the rubber's polymer chains.

Explanation:

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Answer 2

Answer:

Eraser, piece of rubber or other material used to rub out marks made by ink, pencil, or chalk. The modern eraser is usually a mixture of an abrasive such as fine pumice, a rubbery matrix such as synthetic rubber or vinyl, and other ingredients.