Chemistry, 16.05.2020 13:57 cutegirl0987

1- Calcular la concentración molar de una solución de carbonato de sodio, Na2CO3, que contiene 10,6 g de esta sal en 1 L de solución.

2- El contenido de cafeína en una taza de café de 125 mL es de 0,125 g. Calcule la concentración molar de esta solución, si la fórmula molecular de la cafeína es C8H10N4O2.

3- Una solución de MgCl2 se preparó al 29 %m/v, calcular la molaridad de la mezcla.

4- Determine la concentración molar y molal para una solución de HCl al 35 %m/m y densidad 1,18 g/mL.

5- ¿Cuál es la masa de Nitrato de potasio, KNO3 (MM = 101 g/mol), que está presente en 30 mL de solución 0,45 M?

6- ¿Cuál es la fracción molar de una solución que se prepara mezclando 10 g de metanol, CH4O y 27 g de agua?

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1- Calcular la concentración molar de una solución de carbonato de sodio, Na2CO3, que contiene 10,6...