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4. Which elements would have similar properties to potassium?

1 answer:

5 0

Answer:

The answer is A. Lithium and Sodium

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LiRa [457]

Answer:

$M=1.25M$

Explanation:

Hola,

Dado que la molaridad de una solución es definida en términos de las moles de soluto y el volumen de la solución en litros:

$M=\frac{n}{V}$

Primero debemos calcular las moles de hidróxido de sodio, teniendo en cuenta que su masa molar es de 40 g/mol:

$n=25gNaOH*\frac{1molNaOH}{40gNaOH}=0.625mol$

Luego, el volumen el litros:

$V=500cm^3*\frac{1L}{1000cm^3} =0.500L$

Así, calculamos la concentración molar de la solución:

$M=\frac{0.625mol}{0.500L}\\ \\M=1.25M$

Saludos!

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