If you are talking about American English, there are only about 20 words that have "nse" (See below.). The rest (and there are hundreds) are all "nce". But always consult a dictionary because there is no way to predict which spelling is correct.
sense, immense, expanse, response, rinse, license, dense, co
I apologize for the late response and I still haven't believed that I have made myself clear.
What I want to know is that when I should use the word "respond" or "response"? In what kind of sentence. I hope I have made myself clear after this post.