In the reaction 2H2 + O2 → 2H2O, how many moles of O2 are required to completely

₹0.0

Question: In the reaction 2H2 + O2 → 2H2O, how many moles of O2 are required to completely react with 6 moles of H2?

Options:

Correct Answer: 3 moles

Solution:

From the balanced equation, 2 moles of H2 require 1 mole of O2. Therefore, 6 moles of H2 will require (6/2) = 3 moles of O2.

In the reaction 2H2 + O2 → 2H2O, how many moles of O2 are required to completely react with 6 moles of H2?

In the reaction 2H2 + O2 → 2H2O, how many moles of O2 are required to completely react with 6 moles of H2?

Step 1: Look at the balanced chemical equation: 2H2 + O2 → 2H2O.
Step 2: Identify the ratio of H2 to O2 from the equation. It shows that 2 moles of H2 react with 1 mole of O2.
Step 3: Determine how many moles of O2 are needed for 6 moles of H2. Since 2 moles of H2 need 1 mole of O2, we can set up a proportion.
Step 4: Calculate the number of moles of O2 needed by dividing the moles of H2 by the ratio: 6 moles of H2 ÷ 2 moles of H2 per mole of O2 = 3 moles of O2.
Step 5: Conclude that 3 moles of O2 are required to completely react with 6 moles of H2.

Stoichiometry – Understanding the quantitative relationships between reactants and products in a chemical reaction.
Mole Ratios – Using coefficients from a balanced chemical equation to determine the ratio of moles of reactants and products.