Question

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what is pure substance???​

Answer 1

Answer:

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A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds

Answer 2

ᴀ ꜱᴜʙꜱᴛᴀɴᴄᴇ ᴛʜᴀᴛ ʜᴀꜱ ᴀ ꜰɪxᴇᴅ ᴄʜᴇᴍɪᴄᴀʟ ᴄᴏᴍᴘᴏꜱɪᴛɪᴏɴ ᴛʜʀᴏᴜɢʜᴏᴜᴛ ɪꜱ ᴄᴀʟʟᴇᴅ ᴀ ᴘᴜʀᴇ ꜱᴜʙꜱᴛᴀɴᴄᴇ ꜱᴜᴄʜ ᴀꜱ ᴡᴀᴛᴇʀ, ᴀɪʀ, ᴀɴᴅ ɴɪᴛʀᴏɢᴇɴ. ᴀ ᴘᴜʀᴇ ꜱᴜʙꜱᴛᴀɴᴄᴇ ᴅᴏᴇꜱ ɴᴏᴛ ʜᴀᴠᴇ ᴛᴏ ʙᴇ ᴏꜰ ᴀ ꜱɪɴɢʟᴇ ᴇʟᴇᴍᴇɴᴛ ᴏʀ ᴄᴏᴍᴘᴏᴜɴᴅ.