<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-893X</journal-id>
<journal-title><![CDATA[Educación química]]></journal-title>
<abbrev-journal-title><![CDATA[Educ. quím]]></abbrev-journal-title>
<issn>0187-893X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Química]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-893X2020000100012</article-id>
<article-id pub-id-type="doi">10.22201/fq.18708404e.2020.1.70021</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El algebra de la estequiometría]]></article-title>
<article-title xml:lang="en"><![CDATA[Stoichiometry&#8217;s algebra]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García García]]></surname>
<given-names><![CDATA[José Luís]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Pedagógica Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>31</volume>
<numero>1</numero>
<fpage>138</fpage>
<lpage>150</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2020000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2020000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2020000100012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La estequiometría es uno de los conceptos más importantes, y también más difíciles de la química. En este artículo planteamos un mecanismo alternativo de entender la estequiometría en términos del uso las leyes de Avogadro, más allá de soluciones numéricas concretas. Este método permite separar soluciones analíticas generales de soluciones numéricas particulares. Esta separación permite acelerar el trabajo numérico en ejercicios o réplicas experimentales gracias a que la parte analítica ya queda estandarizada, y a que se puede aplicar un análisis dimensional acelerado que denominamos implícito. El uso de ecuaciones permite adicionalmente hacer más explícito el vínculo histórico entre la química de gases y la estequiometría. Se deja la puerta abierta para un estudio de campo comparativo entre este método analítico y el método de factores de conversión en los diferentes niveles de estudio de la química donde se emplea la estequiometría básica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Stoichiometry is one of the most important, and also most difficult, concepts of chemistry. In this article we propose an alternative mechanism to understand stoichiometry in terms of the analytical use the laws of Avogadro, beyond concrete numerical solutions. This method allows to separate general analytical solutions from particular numerical solutions. This separation allows to accelerate the numerical work in exercises or experimental replicas thanks to the fact that the analytical part is already standardized, and also to an accelerated dimensional analysis that we call implicit. The use of equations allows to show the historical link between gas chemistry and stoichiometry. The door is open for a comparative field study between this analytical method and the conversion factor method at the different levels of chemistry study where basic stoichiometry is used.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Estequiometría]]></kwd>
<kwd lng="es"><![CDATA[avance de la reacción]]></kwd>
<kwd lng="es"><![CDATA[reactivo limitante]]></kwd>
<kwd lng="es"><![CDATA[gravimetría]]></kwd>
<kwd lng="es"><![CDATA[titulación]]></kwd>
<kwd lng="es"><![CDATA[química de gases]]></kwd>
<kwd lng="en"><![CDATA[Stoichiometry]]></kwd>
<kwd lng="en"><![CDATA[reaction progress]]></kwd>
<kwd lng="en"><![CDATA[limiting reagent]]></kwd>
<kwd lng="en"><![CDATA[gravimetry]]></kwd>
<kwd lng="en"><![CDATA[titration]]></kwd>
<kwd lng="en"><![CDATA[gas chemistry]]></kwd>
</kwd-group>
</article-meta>
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