Question

what is meant by a pure substance​

Answer 1

ᴀɴʏ sᴜʙsᴛᴀɴᴄᴇ ɪs sᴀɪᴅ ᴛᴏ ʙᴇ ᴘᴜʀᴇ ɪғ ᴀɴᴅ ᴏɴʟʏ ɪғ ɪᴛ ɪs ᴍᴀᴅᴇ ᴜᴘ ᴏғ ᴀ sɪɴɢʟᴇ ᴛʏᴘᴇ ᴏғ ᴘᴀʀᴛɪᴄʟᴇs ᴍᴇᴀɴs ᴀʟʟ ᴛʜᴇ ᴘᴀʀᴛɪᴄʟᴇs ᴏғ ᴛʜᴀᴛ sᴜʙsᴛᴀɴᴄᴇ sʜᴏᴜʟᴅ ʙᴇ ᴏғ sᴀᴍᴇ ᴄʜᴇᴍɪᴄᴀʟ ɴᴀᴛᴜʀᴇ. ғᴏʀ ᴇxᴀᴍᴘʟᴇ ᴡᴀᴛᴇʀ, sᴜɢᴀʀ, sᴀʟᴛ, sᴏᴅɪᴜᴍ, ᴛɪɴ, ᴇᴛᴄ.

Answer 2

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A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample.