Chemical Reactions, Gas laws and Thermochemistry Challenge

I need to get detailed step by step solutions and answers to all TEN homework challenge problems. I am mentoring a college student but she needs help with this assignment. I have been out of college for 19 years. It is due at 9:00PM (Central Standard Time) on Wednesday, 3/29/17. She must show her step by step work for solving the problems. The answer must be accurate to correct significant figures. The professor insists that he must be able to follow each step by step problem solving scratch work for each question to duplicate the answer given at the end of the work shown.