Question

0.25 g of an element 'M' reacts with excess fluorine to produce 0.547 g of the hexafluoride MF. What is the element?
[A] Cr (B) Mo (C) S (D) Te​

Answer 1

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Refer to the attachment

Explanation:

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Answer 2

Answer:

ᴍᴏ

Explanation:

ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ᴜɴᴋɴᴏᴡɴ ᴇʟᴇᴍᴇɴᴛ (ᴍ) ᴀɴᴅ ғ ᴡɪʟʟ ʙᴇ ᴀs ғᴏʟʟᴏᴡs

ᴍ+ғ→ᴍғ

.ɢ ᴏғ ᴍ ʀᴇᴀᴄᴛs ᴡɪᴛʜ ᴇxᴄᴇss ᴏғ ғ2 ᴀɴᴅ ʜᴇɴᴄᴇ ᴀʟʟ ᴏғ ɪᴛ ᴡᴏᴜʟᴅ ʜᴀᴠᴇ ʀᴇᴀᴄᴛᴇᴅ ᴀɴᴅ ᴀᴘᴘᴇᴀʀ ɪɴ ᴛʜᴇ ʜᴇxᴀғʟᴜᴏʀɪᴅᴇ. sᴏ, (. - .) = .ɢ sʜᴏᴜʟᴅ ʙᴇ ᴛʜᴇ ᴡᴇɪɢʜᴛ ᴏғ ғ ᴛʜᴀᴛ ᴍᴜsᴛ ʜᴀᴠᴇ ʀᴇᴀᴄᴛᴇᴅ ᴀs ᴀʟʟ ᴛʜᴇ ᴡᴇɪɢʜᴛ ᴏғ ғʟᴜᴏʀɪɴᴇ ᴛʜᴀᴛ ʀᴇᴀᴄᴛs ᴍᴜsᴛ ᴀᴘᴘᴇᴀʀ ɪɴ ᴛʜᴇ ᴘʀᴏᴅᴜᴄᴛ. ᴛʜɪs ɪs ʙᴇᴄᴀᴜsᴇ ᴏғ ʟᴀᴡ ᴏғ ᴄᴏɴsᴇʀᴠᴀᴛɪᴏɴ ᴏғ ᴍᴀss.

sᴏ, 0.297 ɢ ᴏғ ғ ʀᴇᴀᴄᴛs ᴡɪᴛʜ .ɢ ᴏғ ᴇʟᴇᴍᴇɴᴛ ᴍ.

ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ ᴛʜᴀᴛ ᴡᴇ ʜᴀᴠᴇ ᴡʀɪᴛᴛᴇɴ ᴀʙᴏᴠᴇ, ᴍᴏʟᴇs ᴏғ ғ ᴡɪʟʟ ʀᴇᴀᴄᴛ ᴡɪᴛʜ ᴍᴏʟᴇ ᴏғ ᴇʟᴇᴍᴇɴᴛ ᴍ.

×ɢ ᴏғ ғ ʀᴇᴀᴄᴛs ᴡɪᴛʜ “x“ ɢ ᴏғ ᴍ ᴡʜᴇʀᴇ “x“ ɪs ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴏғ ᴍ.

ᴘᴜᴛᴛɪɴɢ ᴀʟʟ ᴛʜᴀᴛ ᴡᴇ ᴋɴᴏᴡ ᴛᴏɢᴇᴛʜᴇʀ, ᴡᴇ ᴄᴀɴ sᴏʟᴠᴇ ғᴏʀ “x“ ᴀs,

.x=.

x=×..=

ᴛʜᴇ ᴀᴛᴏᴍɪᴄ ᴍᴀss ᴏғ ᴇʟᴇᴍᴇɴᴛ ᴍ ɪs . ɪᴛ ɪs ᴍᴏ.

sᴏ, ᴛʜᴇ ᴀɴsᴡᴇʀ ɪs (ʙ).