Question

In the reaction 2H2 + O2 --> 2H2O, how many moles of oxygen are required to fully react with 6.0 mol of hydrogen?

A) 1.0 mol
B) 2.5 mol
C) 3.0 mol
D) 7.5 mol

Answer 1

The correct answer is C) 3.0 mol. The balanced chemical equation shows that two moles of hydrogen react with one mole of oxygen to produce two moles of water, hence 6.0 moles of hydrogen require 3.0 moles of oxygen.

Step-by-step explanation:

In the balanced chemical equation 2H2 + O2 → 2H2O, the stoichiometric ratio of hydrogen (H2) to oxygen (O2) is 2:1. This indicates that two moles of hydrogen react with one mole of oxygen to produce two moles of water. Therefore, to fully react with 6.0 moles of hydrogen, we need half that amount of oxygen, which is 3.0 moles.

Based on the stoichiometry of the reaction, 3.0 moles of oxygen are required to fully react with 6.0 moles of hydrogen. This is because every 2 moles of hydrogen require 1 mole of oxygen to produce water, as indicated by the balanced chemical equation.Therefore, the correct answer is:C) 3.0 mol

Answer 2

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Actually Welcome to the Concept of the Stochiometry.

Hence, here we can clearly see that, for 2 moles of Hydrogen, we need 1 mole of oxygen molecules,

so, then 6 moles of Hydrogen we need, 3 moles of Oxygen.

hence option c.) 3 mole