Answer:

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Answer:

ᴇʟʟᴏ !! ᴀᴘ ᴍᴇʟᴇ ᴋᴏ ʙʜᴜʟ ɢʏɪ ɴᴀ.

Step-by-step explanation:

Key Points. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.