Use the Oracle JET generic responsive utility classes to hide content, end align text, and set float in your grid.
oj-size-hide: Hide content at the specified size.
oj-size-text-align-end: In left-to-right languages, set text-align to right. In right-to-left languages, set text-align to left.

oj-size-float-end: In left-to-right languages, set float to right. In right-to-left languages, set float to left.

oj-size-float-start: In left-to-right languages, set float to left. In right-to-left languages, set float to right.
To see examples that implement the responsive helper classes, consult the Oracle JET Cookbook at Responsive Helpers.