Question

34. What is formula unit mass? How is it different from molecular mass?
OR
Find the number of moles in the following:
(0) 50 g of HO
(1) 7 g of Na​

Answer 1

Answer:

Formula mass is defined as the sum of atomic masses of the ions present in the formula unit of an ionic compound whereas molecular mass is the sum of the atomic masses of the atoms in a molecule.

Answer 2

Answer:

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ғᴏʀᴍᴜʟᴀ ᴍᴀss ɪs ᴅᴇғɪɴᴇᴅ ᴀs ᴛʜᴇ sᴜᴍ ᴏғ ᴀᴛᴏᴍɪᴄ ᴍᴀssᴇs ᴏғ ᴛʜᴇ ɪᴏɴs ᴘʀᴇsᴇɴᴛ ɪɴ ᴛʜᴇ ғᴏʀᴍᴜʟᴀ ᴜɴɪᴛ ᴏғ ᴀɴ ɪᴏɴɪᴄ ᴄᴏᴍᴘᴏᴜɴᴅ, ᴡʜᴇʀᴇᴀs ᴍᴏʟᴇᴄᴜʟᴀʀ ᴍᴀss ɪs ᴛʜᴇ sᴜᴍ ᴏғ ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ᴍᴀssᴇs ᴏғ ᴛʜᴇ ᴀᴛᴏᴍs ɪɴ ᴀ ᴍᴏʟᴇᴄᴜʟᴇ. ᴛʜᴇ ᴜɴɪᴛs ᴏғ ғᴏʀᴍᴜʟᴀ ᴍᴀss “ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴜɴɪᴛ”