The answer to this question is "STYMY" which means to hinder or prevent. This happened when the two boxers battled toe-to-toe until the final round comes and when the longtime champion of the ring was finally STYMY by his young and strong opponent's stamina. Until the both of them get weaker and when the final round ends only one win and the other one loses.
H2 is molecular hydrogen.it is a molecule of hydrogen that consists of two hydrogen atoms bonded together by one single bond. 2H denotes two moles of elemental hydrogen.it should be noted that elemental hydrogen is not bonded to anything.
