Chemistry Question

Question

Although mixtures of hydrogen and oxygen are highly explosive, pure elemental hydrogen gas itself burns quietly in oxygen with a pale blue flame, producing water vapor.
a) Write (on your paper you will turn in) the balanced equation for the combination reaction that produces water vapor from hydrogen and oxygen gases.
b) Calculate how many moles of water vapor are produced when 7 moles of hydrogen gas are burned in air.
moles of water vapor
c) Calculate how many moles of water vapor are produced when 22 moles of oxygen gas are burned in air
moles of water vapor
d) Calculate the mass, in grams, of water vapor produced when 66 g of hydrogen gas is burned.
g of water vapor
e) How much oxygen gas, in grams, is needed to completely react with the 66 g of hydrogen gas from part d?
g of oxygen gas

Answer 1

 2H₂(g) + O₂(g) → 2H₂O(g)

 

7 moles H₂  *2 moles H₂0 

                     2 moles H₂     = 7 moles  H₂O