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Mkey [24]
3 years ago
8

Neeru is looking at her kids backpack and wants to compare their masses. What is the best tool Neeru can use to find the mass of

each backpack?
A) graduated cylinder
B) balance
C) ruler
D) beaker
Chemistry
1 answer:
lisov135 [29]3 years ago
3 0
B would be the best to measure mass
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El porcentaje en volumen (%v/v) expresa el volumen de soluto (alcohol en este caso) que hay cada 100 mL de solución. Si la solución tiene una concentración del 4,5% v/v eso quiere decir que hay 4,5 ml de alcohol cada 100 ml de solución, de acuerdo a lo siguiente:

4,5% v/v alcohol = volumen alcohol/ volumen solución x 100 = 4,5 mL alcohol/100 mL solución= 4,5 mL alcohol/0,1 L alcohol

Por lo tanto, al multiplicar por el volumen total de la solución (1 L), obtenemos la cantidad total de alcohol:

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