Mercury can be obtained by reacting mercury(II) sulfide with calcium oxide. How many grams of calcium oxide are needed to produce 36.0 g of Hg?4HgS(s) + 4CaO(s) ® 4Hg(l) + 3CaS(s) + CaSO4Group of answer choices13.4g7.56g10.1g1.80g
Question
Mercury can be obtained by reacting mercury(II) sulfide with calcium oxide. How many grams of calcium oxide are needed to produce 36.0 g of Hg?4HgS(s) + 4CaO(s) ® 4Hg(l) + 3CaS(s) + CaSO4Group of answer choices13.4g7.56g10.1g1.80g
Solution
Para resolver este problema, sigamos los siguientes pasos:
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Escribir la ecuación balanceada:
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Determinar la masa molar de cada compuesto involucrado:
- Hg (mercurio): 200.59 g/mol
- CaO (óxido de calcio): 40.08 g/mol (Ca) + 16.00 g/mol (O) = 56.08 g/mol
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Calcular los moles de Hg producidos:
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Usar la estequiometría de la reacción para encontrar los moles de CaO necesarios: La ecuación balanceada muestra que la relación molar entre Hg y CaO es 1:1. Por lo tanto, se necesitan 0.1795 moles de CaO para producir 0.1795 moles de Hg.
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Calcular la masa de CaO necesaria:
Por lo tanto, se necesitan aproximadamente 10.1 g de CaO para producir 36.0 g de Hg. La respuesta correcta es 10.1g.
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