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3 years ago

Compare the following sodium atoms in terms of their neutrons and mass numbers 24Na, 23Na

Chemistry

1 answer:

olga_2 [115]3 years ago

7 0

Na-24 and Na-23 have the same number of atoms=11, different neutrons(13 and 12),different mass number(24 and 23)

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Isotopes have the same number of protons and having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

₁₁²³Na

number of atoms = 11

mass number = 23

number of neutrons=23-11=12

₁₁²⁴Na

number of atoms = 11

mass number = 24

number of neutrons=24-11=13

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Ierofanga [76]

Answer:

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Explanation:

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We know that, number of moles of a compound is the ratio of mass to molar mass of the compound.

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3 years ago

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aksik [14]

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3 years ago

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sergij07 [2.7K]

Answer:

$\%Ca=19.378\%$

Explanation:

¡Hola!

En este caso, basado en la información dada, es posible conocer la masa de calcio en carbonato de calcio, que de hecho es la misma en la muestra, al utilizar el siguiente esquema de cálculo:

$m_{Ca}=1,2093gCaCO_3*\frac{1molCaCO_3}{100.1gCaCO_3}*\frac{1molCa}{1molCaCO_3}*\frac{40.1gCa}{1molCa}\\\\m_{Ca}=0.48444gCa$

Finalmente, calculamos el porcentaje requerido como sigue:

$\% Ca=\frac{0.48444g}{2.5000g} *100\%\\\\\%Ca=19.378\%$

¡Saludos!

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3 years ago

Compare the following sodium atoms in terms of their neutrons and mass numbers 24Na, 23Na​

Compare the following sodium atoms in terms of their neutrons and mass numbers 24Na, 23Na