The Space Shuttle's rocket boosters use hydrogen and oxigen, which combine to form water as fuel.?

Question

The balance chemical equation of this exothermic reaction is:

a. 2H2(g)+O(g)-->2H2O(g)

b.2H2(g)+3O(g)-->3H2O(g)

c.2H(g)+O(g)-->2H2O(g)

d.2H2(g)+O2(g)-->2H2O(g)

Answer 1

Hydrogen is H2, Oxygen is O2 and only d) is correct and balanced

Answer 2

Answer is D

this is because both oxygen and hydrogen are diatomic molecules meaning they always exist as H2 or O2