Inherited IRA Account

Thank you for taking my question. 

My husband passed away 2 months ago and he had an account with Charles Schwab.  They had me open an inheritance account in my name and they have since transferred the funds to my acct.  

My husband and I decided just before he passed away to pay the mortgage off so that I would at least have he house paid for.  I am 71 years old.

Question:  If my inherited balance is 150K; can I withdraw 75K to pay off our home and what would the tax consequences be for me?

Thank you.