Se disuelven 200 ml de etanol C2H6O al 70 % en volumen con 300 ml de agua calcular considerando que los volúmenes son aditivos El % en volumen de alcohol.

28%

Explanation:

Primero calculamos los mililitros de etanol presentes en la primera solución:

200 mL * 70/100 = 140 mL etanol

Para calcular el nuevo porcentaje en volumen, dividimos los mililitros de etanol (que permanecen iguales durante el proceso de dilución) entre el volumen final.

Volumen final = 200 mL + 300 mL = 500 mL% Volumen de Etanol = 140 mL / 500 mL * 100% = 28%

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