How many atoms of 12C are there in a 3.50 gram sample of this particular isotope?Question 5Select one:a.1.72 x 1023b.1.76 x 1023c.2.07 x 1024d.2.11 x 1024e.8.01 x 1023
Question
How many atoms of 12C are there in a 3.50 gram sample of this particular isotope?Question 5Select one:a.1.72 x 1023b.1.76 x 1023c.2.07 x 1024d.2.11 x 1024e.8.01 x 1023
Solution
Para resolver esta pregunta, debemos seguir los siguientes pasos:
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Determinar la masa molar del 12C: La masa molar del carbono-12 (12C) es de 12 gramos por mol.
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Calcular el número de moles en la muestra: Utilizamos la fórmula: Sustituyendo los valores:
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Utilizar el número de Avogadro para encontrar el número de átomos: El número de Avogadro es átomos por mol. Multiplicamos el número de moles por el número de Avogadro:
Por lo tanto, la respuesta correcta es: b.
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