Hi ppl, I have this question. I have the MF of a substance A : C7H7O2N. I have three pieces of info which should indicate a structural property of this substance:i) A reacts with sodium carbonate to give off CO2. I thought this might indicate an ionic structure? then ii) A will form a coloured complex ion with copper (II) cations. I didn't know what this suggested really I'm afraid and finally:iii) A is unable to undergo addition reactions easily. Could someone help me with this?