In html how to link form submit to open in new tab and link relative URL?

I’m trying to link the submit button to open my URL in a new tab but at best I’ve managed to open an error window. Is the form action the correct way? Thanks

<div class="container">
      <h3>Contact Form</h3>
    ***<form action="_blank><a href="Home.html"></a>***
      <input type="submit" value="Submit"><br>