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1-Convierta las siguientes unidades: 1250ppb a ppm 2.15% a ppm 9500mg/L a % 0.025ppm a ppb 0.0005%appb 2-Obtenga los factores de dilucin de las siguientes

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1-Convierta las siguientes unidades: 1250ppb a ppm 2.15% a ppm 9500mg/L a \% 0.025ppm a ppb 0.0005%appb 2-Obtenga los factores de dilucin de las siguientes disoluciones: 0.15g en 200ml 0.125g en 100ml 0.15g en 25ml 25g en 2ml 0.75g en 200ml 3-A partir de una solucin madre de 250ppm calcule cuantos ml de esta necesita para preparar 25ml de stds de 5 , 10 y 40ppm

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