Verified Answer :

AmbitiousDino

1/2 because it would land either heads or tails. 2 possibilities of each landing makes it 1/2.

the answer is 1/2  because you have heads and tails.  you only have two options of turning.  so you have one opportunity of getting heads since you only have two options of getting heads.  
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hope this helps.  

ps  the number of chances depends on the number of coins that you have.  all you have to do is double the chances to the number of coins.

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