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3 years ago

1. Which graph shows the melting of crystalline solids? Explain your reasoning.

Chemistry

1 answer:

madreJ [45]3 years ago

8 0

(1) The melting of a crystalline solid is best depicted by the second graph. This is because, the second graph shows a horizontal line which means that for a while there was no change in temperature. This zone is the latent heat of fusion.

(2) The first graph shows the graph of a solid that is just heated but does not experience phase change. However, the second graph shows a solid that changes phase (from crystal/solid to liquid).

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When a gas is heated, the gas particles have more kinetic energy. Complete the following sentence: This means they move about mo

Volgvan

Answer:

Contact

Explanation:

As the speed of the particles increases, they move around more, which means they hit the sides of the container more.

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3 years ago

A common radio wavelength observed coming from astronomical objects is 21 cm. What temperature is associated with this radiation

qaws [65]

Answer:

The temperature associated with this radiation is 0.014K.

Explanation:

If we assume that the astronomical object behaves as a black body, the relation between its wavelength and temperature is given by Wien's displacement law.

$\lambda_{max}=\frac{b}{T}$

where,

λmax is the wavelength at the peak of emission

b is Wien's displacement constant (2.89×10⁻³ m⋅K)

T is the absolute temperature

For a wavelength of 21 cm,

$T=\frac{b}{\lambda _{max} } = \frac{2.89 \times 10^{-3} m.K }{0.21m} =0.014K$

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3 years ago

Define satt and give an example?

Veseljchak [2.6K]

Answer:

<h2>Heyy..Here is your answer..</h2>

<h2>Satt is the German word for full and it most likely comes from the same Latin word that saturated.</h2>

<h2>Hope it helps..!!</h2>

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2 years ago

What is the balanced equation for naphthalene and sulphur?

Marianna [84]

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Explanation:

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3 years ago

How do elements on the right side of the periodic table differ from elements on the left side of the table?

lozanna [386]

The answer is c.

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Elements on the right side are non metals, such as Chlorine, Fluorine, Bromine, etc.

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3 years ago