Hi billybatz09,
thanks for using MH TechMagazine.
Please have a look at your previously created thread: How to Remove Sidebar?
Because if you want to hide the sidebar on posts, it’s quite the same:
.single-post .mh-sidebar { display: none; }
.single-post .mh-content { width: 100% !important; }
To hide the sidebar on particular posts, you would need to make use of the post ID, for example:
.postid-105 .mh-sidebar { display: none; }
.postid-105 .mh-content { width: 100% !important; }
In general you can always use tools like Firebug or your browsers inspection tool to inspect the elements on your site and then add your own CSS code based on your personal requirements.
You can add custom CSS code to your website by using a suitable plugin.