If my spouse was disabled and passed away will I be entitled to widow/widower benefits?

If your spouse was 100% disabled for 10 years prior to death the spouse is eligible to receive Widow’s benefits.  

OR

If the Veteran was not 100% disabled for 10 years prior to death but nevertheless the Veteran’s death was due to or furthered by a service connected impairment the spouse is eligible for Widow’s benefits.