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3 years ago

Which statements are inconsistent with Rutherford's nuclear theory as it was originally stated? Why?

Chemistry

1 answer:

Alexeev081 [22]3 years ago

7 0

Answer:

a, c, and d.

Explanation:

By Rutherford's nuclear theory, an atom is formed by a positive nucleus, which is presented protons (with positive charge) and neutrons (with neutral charge), surrounded by electrons, which have a negative charge. The protons and the neutrons have a large mass than the electrons, and so are larger.

The mass of an atom is concentrated in the nucleus, but its volume is considered a "huge empty" because the electrons are far away from the nucleus, which as noticed when alpha particles crossed gold leaves (Rutherford's experiment).

a. The volume of the nucleus depends also on the neutrons, and the most volume of the atom is empty, so the statement is incorrect.

b. A neutral atom has the same number of protons and electrons. The number of protons is also the atomic number, so, for nitrogen, it's 7, and the statement is correct.

c. The atomic number of phosphorus is 15 so the neutral atom has 15 protons and 15 electrons, so the statement is incorrect.

d. The mass of an atom is concentrated in the nucleus, so the majority of the mass is due to the protons and neutrons, and the statement is incorrect.

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B: The total thermal energy is greater in a large body of water than one much smaller

Explanation:

A large lake filled filled with cool water will have more thermal energy than smaller pond filled with warmer water because the total thermal energy is greater in a large body of water than one that is much smaller.

Thermal energy is a form of kinetic energy usually due to transfer of heat energy.

Amount of heat energy is dependent on the differences in temperature, mass and specific heat capacity of a body.

Both lake water will have the same specific heat capacity. Since larger body of water has more mass, it will possess more thermal energy.

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3 years ago

Calcule la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) que se preparó al mezclar, en un recipiente aforado, 4 mo

oee [108]

Considerando la definición de molaridad, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 $\frac{moles}{litro}$ .

La molaridad es una medida de la concentración de un soluto en una disolución que se define como el número de moles de soluto que están disueltos en un determinado volumen.

La molaridad de una solución se calcula dividiendo los moles del soluto por el volumen de la solución:

$Molaridad=\frac{numero de moles de soluto}{volumen}$

La Molaridad se expresa en las unidades $\frac{moles}{litro}$ .

En este caso, sabes que una solución acuosa se preparó al mezclar 4 moles del ácido con suficiente agua hasta completar 8 litros de solución. Entonces, sabes que:

número de moles de soluto= 4 moles
volumen= 8 litros

Reemplazando en la definición de molaridad:

$Molaridad=\frac{4 moles}{8 litros}$

Resolviendo:

Molaridad= 0.5 $\frac{moles}{litro}$

Finalmente, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 $\frac{moles}{litro}$ .

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