3 years ago

The process of shedding an outgrown exoskeleton.

Chemistry

1 answer:

Alex73 [517]3 years ago

3 0

Answer:

Mouthing is the answer to your question

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Temperature and Heat

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Proportional to the average kinetic energy of the molecules in a substance.

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When rubidium ions are heated to a high temperature, two lines are observed in its line spectrum at wavelengths (a) 7.9 × 10−7 m

svetlana [45]

Answer:

The frequencies of the two lines are:

a) $3.79\times 10^{14} s^{-1}$

b) $7.14\times 10^{14} s^{-1}$

When we heat rubidium compound we will see red color.

Explanation:

$\nu=\frac{c}{\lambda }$

c = speed of light

$\lambda$ = wavelength of light

a) Frequency of the light when wavelength is equal to $7.9\times 10^{-7} m$

$\nu=\frac{c}{\lambda }$

$\nu=\frac{3\times 10^8m/s)}{7.9\times 10^{-7}}$

$\nu=3.79\times 10^{14} s^{-1}$

This frequency corresponds to red light

b) Frequency of the light when wavelength is equal to $4.2\times 10^{-7} m$

$\nu=\frac{c}{\lambda }$

$\nu=\frac{3\times 10^8m/s)}{4.2\times 10^{-7}}$

$\nu=7.14\times 10^{14} s^{-1}$

This frequency corresponds to violet light

When we heat rubidium compound we will see red color.

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Which of the following sentences uses commas correctly?

lisabon 2012 [21]

The first choice is correct. That’s because it uses the comma to pause the sentence, so the statement and question fit together

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