Question

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laboratorio: identificación de nutrientes asegúrese de obtener mediciones precisas con una pipeta graduada before dispensing (8 ml) after dispensing a (6 ml) b (4 ml) ¿cuál pipeta de arriba muestra que se han dispensado 4 ml de líquido? líquido? opciones: a, b, ni, ambos

Explanation:

Step1: Analyze Pipette A

Before dispensing, the volume is 9 mL. After dispensing, Pipette A shows 5 mL. The volume dispensed by A is $9 - 5 = 4$ mL.

Step2: Analyze Pipette B

Before dispensing, the volume is 9 mL. After dispensing, Pipette B shows 4 mL. The volume dispensed by B is $9 - 4 = 5$ mL.

Step3: Compare with Required Volume

We need to find which pipette dispensed 4 mL. From Step1, Pipette A dispensed 4 mL.

Answer:

A (the pipette labeled A)