a mixture of two liquids n2h4 and n2o4 are used in rockets the produce n2 and water vappour

Answer 1

Three hints.
1. You need to find the caps key and use it.
2. You need to use proper sentence structure so we know when one sentence ends and the next one starts.
3. You need to rewrite this question and rephrase it so it makes sense. As is it makes no sense whatsoever.