Which sentence correctly explains the change that occurs when ice melts? Ice melting is a physical change, and the state of the substance remains the same.
Ice melting is a physical change, and the mass of the substance remains the same.
Ice melting is a chemical change, and the state of the substance remains the same.
Ice melting is a chemical change, and the mass of the substance remains the same.

Ice melting is a physical change, and the mass of the substance remains the same.

Explanation:

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In this case, since the phase transitions from solid to liquid, liquid to gas, solid to gas and vice versa are physical changes by which the molecules change their arrangement, being close for solids, not so close, not so far for liquids and spread for gases, the more the energy added, the more separated the molecules they turn out.

However, when the appropriate amount of energy is added, the mass of the changing substance remains the same and the change takes place, it means that the correct answer, when ice melts, is ice melting is a physical change, and the mass of the substance remains the same.

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Explanation:

CH₃C(CH₃)=CH-CH₂-CH₃ ( 2 - methylpent-2-ene)

Cl₂ ⇒ Cl⁺ + Cl⁻

Cl⁺( electrophile)

CH₃C(CH₃)=CH-CH₂-CH₃  + Cl⁺ ( electrophile)  ⇒ CH₃C⁺(CH₃)-C(Cl)H-CH₂-CH₃ (  intermediate )

CH₃C⁺(CH₃)-C(Cl)H-CH₂-CH₃ + Cl⁻  ⇒ CH₃CCl(CH₃)-C(Cl)H-CH₂-CH₃ ( final product )

It is electrophilic addition reaction.