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■Calcular las ppm de 80 mg de ion sufato SO4 en 5 litros de agua
■Calcular la concentración en ppm de una solución compuesta por 1,7Kg de sal y 20 litros de agua
El resultado de un análisis de una muestra indica que hay 0.025 mg de cadmio en 500 ml de agua ¿Cuál es la concentración en ppm?
Sagot :
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