If objects with a greater mass have greater gravitational pull, why is our solar system, Sun, planets and asteroids, NOT pulled into Alpha Centauri A?

Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?

What is bromine+calcium iodide--> calcium bromide +iodine balanced