I have been taking chemistry for a while now, and recentley have been getting confused. And the more I get taught the more I get behind because Im not understanding it. I took old problems that I got wrong on past quizzes, tests, and homework and tried to work them to get the right answers. But, am having trouble. There are 80 questions that I compiled together to try to understand. If anyone could do them for me so I at least know the answers, it would be great. Let me know! ASAP, PLEASE! thanks!