what is molecular mass?
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The molecular mass is the mass of a given molecule: it is measured in daltons. Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element.
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ᴛʜᴇ ᴍᴏʟᴇᴄᴜʟᴀʀ ᴍᴀss ɪs ᴛʜᴇ ᴍᴀss ᴏғ ᴀ ɢɪᴠᴇɴ ᴍᴏʟᴇᴄᴜʟᴇ: ɪᴛ ɪs ᴍᴇᴀsᴜʀᴇᴅ ɪɴ ᴅᴀʟᴛᴏɴs. ᴅɪғғᴇʀᴇɴᴛ ᴍᴏʟᴇᴄᴜʟᴇs ᴏғ ᴛʜᴇ sᴀᴍᴇ ᴄᴏᴍᴘᴏᴜɴᴅ ᴍᴀʏ ʜᴀᴠᴇ ᴅɪғғᴇʀᴇɴᴛ ᴍᴏʟᴇᴄᴜʟᴀʀ ᴍᴀssᴇs ʙᴇᴄᴀᴜsᴇ ᴛʜᴇʏ ᴄᴏɴᴛᴀɪɴ ᴅɪғғᴇʀᴇɴᴛ ɪsᴏᴛᴏᴘᴇs ᴏғ ᴀɴ ᴇʟᴇᴍᴇɴᴛ.
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