Can a closed system gain particles

Compare and contrast the bohr model and the electron cloud models of the atom.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .