When 1,2-diaminoethane, h2nch2ch2nh2, dissolves in water, the resulting solution is basic. write the formula of the ionic compound that is formed when 2 molar equivalents of hydrochloric acid (hcl) is added to a solution of 1,2-diaminoethane?

Because 1,2-diaminoethane is base, this compound gain protons from acid (in this example hydrochloric acid) and becaume ionic compound with positive charge (cation). 
1,2-diaminoethane is organic compound and hydrochloric acid is inorganic compound.
Balance chemical reaction: 
H₂NCH₂CH₂NH₂(aq) + 2HCl(aq) → ⁺H₃NCH₂CH₂NH₃⁺(aq) + 2Cl⁻(aq).

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.