This Celtic symbol of everlasting love is formed from two triskeles. The triskeles, three cornered knots, denote the three aspects of two people, body, mind and spirit. The two triskeles, joined together, show a circle, the everlasting circle of eternity.
All the others are weak acids. A strong acid is one that dissociates completely when it dissolves in water. Dissociate means that the substance splits apart into ions. There are only a few strong acids in water, they are: HBr, HCl, HI, HNO3, HClO4 and H2SO4 (for the first H only) All other acids are weak acids. Chemists use the term strong or weak with regard to acids and bases to tell how much the substance dissociates in water.
Technically they are different. HBr is hydrobromic acid and it is a gas in its natural state. The way you have HBr(aq) written means an aqueuos solution of hydrobromic acid. Basically it means gaseous hydrobromic acid dissolved or bubbled in water.