Yes, you may travel outside the U.S. while your Adjustment of Status application is being processed, however, you must receive advance permission called
Advance Parole to return to the U.S. if you are traveling outside the U.S. If you do not apply for Advance Parole before you leave the country, you will abandon your application with United States Citizenship and Immigration Services (USCIS), and you may not be permitted to return to the U.S.
Note: However, if you have accrued more than 180 days of unlawful presence and then travel abroad, you will be barred from Adjustment of Status for either three years or 10 years, even if you were granted Advance Parole, unless you are granted a hardship waiver.
You may check visa status by using VisaPro's free visa status service.