Question

In the Chemical Equation 2H2+O2 2H2O. What type of reaction is this (Synthesis, Decomposition, Single Displacement, Double Displacement, or Combustion) and explain why. 2.) What is the mole ratio of hydrogen (H2) to oxygen (O2) for this reaction?

A) Combustion; The reactants combine to form water, and it releases energy. The mole ratio is 2:1.
B) Synthesis; The reaction produces a single compound from its elements. The mole ratio is 2:1.
C) Decomposition; The reaction breaks down water into its elements. The mole ratio is 1:2.
D) Double Displacement; The reaction involves the exchange of ions between reactants. The mole ratio is 1:1.

Answer 1

The reaction 2H2 + O2 → 2H2O is a synthesis reaction involving two simpler substances forming water. It can also be considered a combustion reaction because it releases energy. The mole ratio of hydrogen to oxygen in this reaction is 2:1.

Step-by-step explanation:

The chemical equation 2H₂ + O₂ → 2H₂O represents a synthesis reaction because it combines two simpler substances, hydrogen and oxygen, to form a single more complex substance, water. It is also an example of a combustion reaction because it involves the burning of hydrogen in oxygen, producing water and releasing energy. Therefore, the correct answer is B) Synthesis; The reaction produces a single compound from its elements. However, in terms of the type of reaction involving energy release, it could also be considered a combustion reaction. The mole ratio of hydrogen (₂) to oxygen (O₂) for this reaction is 2:1 since two moles of hydrogen react with one mole of oxygen to produce two moles of water.