Answer to Question #50361 in Chemistry for Meagan

Question

How many cm3 of oxygen would be required to react completely with 432 cm3 of hydrogen gas according to the reaction below?

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

Answer 1

Forgasses we don`t have to transform volumes into moles for calculations.
That`swhy according to the equation of chemical reaction the volume of hydrogen is
twice the volume of oxygen.
V(H₂)= 2 ∙ V(O₂)
V(O₂)= V(H₂)/2
V(O₂)= 432 cm³/2
V(O₂)= 216 cm³

Answer: V(O₂)= 216 cm³