What gas evolved during electroplating

I had a gas come out of my beaker when I was electroplating a quarter with copper in chemistry class, what was this gas?

Danielle S.
student - Titusville, Florida , USA
2004

Hydrogen.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
2004

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