Question

Reaction of hydrogen with oxygen produces water 2H 2+O2=2H2O A. how many moles of O2 are required to react with 2.6 moles of H2? B. how many moles of H2 are needed to react with 5.0 moles of O2? C. how many moles of H2O form when 2.5 moles of O2 reacts?

Answer 1

Answer:

A.  1.3 mol O₂

B.  10 mol H₂

C.  5 mol H₂O

Explanation:

2 H₂  +  O₂  ⇒  2 H₂O

According to the equation, for every 2 moles of hydrogen, 1 mole of oxygen is needed to react. Convert between moles of H₂ and moles of O₂ using this relationship.

A.  (2.6 mol H₂) × (1 mol O₂)/(2 mol H₂) = 1.3 mol O₂

B.  (5.0 mol O₂) × (2 mol H₂)/(1 mol O₂) = 10 mol H₂

According to the equation, for every mole of oxygen, 2 moles of water are produced.  Use this relationship to convert.

C.  (2.5 mol O₂) × (2 mol H₂O)/(1 mol O₂) = 5 mol H₂O