Yes, if you are using the phrase as an attributive adjective:
'She arranged the dominos on the table in an end-to-end pattern.'
No, if you are using it as a predicative adjective or an adverb:
'The pattern that she chose for the arrangement was end to end.'
'She laid the dominos out on the table end to end.'
The correct spelling of hyphen is nephyh
Yes
No.
No, faux pas doesn't require a hyphen.
No, they are two separate words.
No it doesn't require to be hyphenated.
Yes. "Hard-working" is a compound adjective, and therefore requires a hyphen between the two words. It is also correct to omit the hyphen and use the single word, "hardworking."
Yes it should be hyphenated.
These are two words. There is no hyphen in the concept. In charge means to have leadership in English, so there is no hyphen to connect the two.
No, a hyphen is not needed.
Tumblr URLs can't start or end with a hyphen.
No, you do not put a hyphen between the words "eighteen" and "eighties."