Question

How many moles of H2O are produced when 3.25 moles of O2 react in the above equation?

a
12.92 moles of H2O

b
3.79 moles of H2O

c
0.06 moles of H2O

d
2.79 moles of H2O

Answer 1

Answer:

D.

Explanation:

using stoichiometric factors to solve this one.

Answer 2

The moles of the reactant and the product produced in the reaction is given by the stoichiometric law. The moles of water produced in the reaction is 2.79 mol.

What is stoichiometric law?

The stoichiometric law states the moles of the reactant and the product in the reaction are equivalent to the stoichiometric coefficient.

For the equation given, stoichiometric law states that:

$\rm 7\;mol\;O_2=6\;mol\;H_2O$

The moles of water produced from the 3.25 moles of oxygen are:

$\rm 7\;mol\;O_2=6\;mol\;H_2O\\\\3.25\;mol\;O_2=\dfrac{6}{7} \;\times\;3.25\;mol\;H_2O\\\\3.25\;mol\;O_2=2.79\;mol\;H_2O$

The moles of water produced in the reaction are 2.79 mol. Thus, option D is correct.

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