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Question
escriba la respuesta correcta en cada casilla ¿qué es la fórmula empírica? un compuesto que se utiliza en medicina experimental es 78,14% de boro (b) y 21,86% de hidrógeno (h). la fórmula empírica del compuesto tendrá una relación de boro a hidrógeno de
Step1: Assume 100g of the compound
So, there are 78.14g of boron (B) and 21.86g of hydrogen (H).
Step2: Calculate the moles of each element
The molar - mass of B is approximately 10.81 g/mol, and for H is 1.008 g/mol. Moles of B=$\frac{78.14g}{10.81g/mol}\approx7.23mol$. Moles of H=$\frac{21.86g}{1.008g/mol}\approx21.69mol$.
Step3: Find the mole - ratio
Divide each number of moles by the smaller number of moles. $\frac{7.23mol}{7.23mol}=1$ for B and $\frac{21.69mol}{7.23mol}\approx3$ for H.
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