There are 11 players on the field per team during a soccer game. Each team has 10 field players and a goalkeeper. Formations a...
Liquid oxygen is not flammable! It does however support vigorous combustion in anything even remotely flammable (like road tarmac, or human beings). That is because is is very reactive indeed. Being in liquid rather than gaseous form simply increases the concentration & availability of the element.
hydrogen has a colorless flame, and oxygen doesn't burn. Well, hydrogen can't explode without oxygen present: 2H2(g) + O2(g) --> 2H2O(g) However, the amount of oxygen present at the time of explosion may have an effect. With the oxygen in the balloon, the expanding gas due to the heat of the reaction probably caused a bigger noise due to the fact that the reaction took place inside the balloon.