Which proportionality applies to Avogadro's law?
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Explanation:

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In this case, since the described chemical reaction is:

And we know that the reacting mass of carbon monoxide is 7.0 g and that of hydrogen is 2.5 g, we identify the limiting reactant by computing the yielded moles of methanol by each reactant as follows:

Thus, since carbon monoxide yields 0.25 moles of methanol only, we infer it is the limiting reactant, therefore the mass of methanol that are produced turn out:

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