hover submit

hey, sorry if this is a real newbie question, but I’m adding css to the submit button
background:#aaa; padding: 11px 17px; font-size: 14px; color: #fff; padding: 9px 12px; display: inline-block; border: 0px; font-weight: bold; cursor: pointer; line-height: 17px; width: auto; -webkit-transition: all 0.1s ease-in-out; -moz-transition: all 0.1s ease-in-out; -o-transition: all 0.1s ease-in-out; -ms-transition: all 0.1s ease-in-out; transition: all 0.1s ease-in-out; float: right;

two thing:
1) how do I add hover actions?
2) float right isn’t working

thanks for taking the time to read.

http://wordpress.org/extend/plugins/easy-contact-forms/