Explain why the pressure of a gas in a flexible container is always equal to external pressure. *Bonus Question*

Which substance below would have particles with the GREATEST average velocity at 300k?

A) Helium, He
B) Nitrogen, N2
C) Oxygen, O2
D) Water, H2O

Can someone check my work 98 5.05 acids and bases for this assignment you will be comparing acids and bases. the chart below will you organize the information needed: acids bases chemical properties (2) deodorant detergent vinger dish soap physical properties (2) orange juice toilet cleaner drain cleaner window cleaner ph level acid ph goes from 0-4 bases ph goes from 10-14 examples around you (2) vinger coffee lemon juice dark chocolate