1 FACT: Protection against whooping cough from early childhood vaccines may wear off, leaving adults and adolescents at risk for infection.  FACT: In China, whooping cough is known as the âcough of 100 daysâ due to the prolonged, dry cough that is experienced by infected individuals.
Which compound contains ionic bonds 1. CaO because Ca is a metal and O is a gas and all the other possibillities are gasses combined and ionic has a metal and gas combination if you look at the periodic table of el â¦ ements the right side is gases but they are determined by like a staircase and the rest are metals.
Write the chemical equation that represents the dissociation of (NH 4) 2 S. Answer. (NH 4) 2 S(s) â 2NH 4 (aq) + S (aq). When chemicals in solution react, the proper way of writing the chemical formulas of the dissolved ionic compounds is in terms of the dissociated ions, not the complete ionic formula.rite the net ionic equation for the reaction of BaCl 2 (aq) and Na 2 SO 4 (aq). You may have to consult the solubility rules. Write the net ionic equation for the reaction of KCl(aq) and NaC 2 H 3 O 2 (aq). You may have to consult the solubility rules.