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Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

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 .