Chemistry, 11.12.2021 01:00, preservations

I need help, I'm scared of failing chemistry and I have nowhere else to go for help. Here are the problems that I need solved. https://paste. pics/FAJCM
https://paste. pics/FAJD2
https://paste. pics/FAJE2
For the first 2 please put the answers as Na+1-(answer)=N-3 so that I know which questions the answers are for. And thank you to whoever answers this because you're a life saver.

Answers: 2

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