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7. Se toman muestras del agua de descarga de una fbrica de papel para detectar dioxinas, una sustancia txica que se forma en el blanqueo

7. Se toman muestras del agua de descarga de una fbrica de papel para detectar dioxinas, una sustancia txica que se forma en el blanqueo de la pulpa de papel. El anlisis de las aguas residuales del arroyo muestra una concentracin de dioxinas de 0,010 g/1,0 mL. Exprese esta concentracin en ppb. El estndar de la EPA para dioxinas es de 1 ppb. Estas aguas residuales violan el estndar de la EPA?

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