i need help with homework and recitation

I need help with

• Online Recitation 9 (Part 2): Precipitation & Neutralization Reactions (3.11, 4.6-4.7, 4.8*)0
• Online Recitation 9 (Part 1): Precipitation & Neutralization Reactions (3.11, 4.6-4.7, 4.8*)
• Homework 20: Solution Stoichiometry (4.4, 4.8)
• Homework 21: Gas Stoichiometry (5.6-5.7)
• Homework 22: Empirical Formula & Combustion Analysis (3.10)

The recitation one of them with timer and the other one without timer you don’t have to do the questions it show practice 0 no points

part 1 no timer

part 2 with timer

i will send the details username

password