If a solid mixture of the three aromatic compounds shown below is placed in 3 M HCl, which is likely to dissolve?

5. (1) Ethan-1,2-diol is miscible with water. Draw this structure and show all the Hydrogen-bonds that a single ethan-1,2-diol molecule can make with waters (as many as you need).

.Calculate the saturation concentration of the following gazes in water at air temperature of 20 °C and a pressure of 1 atm if its concentration in air is 30 ppm. Concentration in air (Cg) 20ppm 370 ppm 2 ppb Gaz H;S CO, CH,

Select one: True or False   1- In case of homo-binuclear covalent bond (of atoms of the same element) and hetero-binuclear covalent bond of very low electronegativity difference (as that between carbon and hydrogen), the bond is very strong and of no or minimum polarity hence not cleaves in water   2-In this compound complexation ( in the image )  is used for qualitative/quantitative identification of phenolic compounds where salicylic acid is chelated by the iron metal in ferric chloride to form water soluble violet color complex   3-Complexes are of different stability some are stable only in aqueous other are stable in both solid and solution however, for the maximum complex stability high metal anaionic charge, small transient metal atom radius and occupied d orbital are required.