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Bumek [7]
3 years ago
7

How hydrogen chloride gas is prepared on labrotary by conc sulpheric acid ​

Chemistry
1 answer:
Citrus2011 [14]3 years ago
4 0

Answer:

It is prepared small amounts of hydrogen cloride for uses in the lab.

It can be  "generated in an HCl generator by dehydrating hydrochloric acid with either sulfuric acid or anhydrous calcium chloride."

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The emission spectrum of cesium contains two lines whose frequencies are (a)
Lady bird [3.3K]

The lines are violet and blue respectively.

<h3>What is the energy?</h3>

We know that the energy of the photon could be obtained by the use of the equation;

E = hf

E = energy

h = Plank's constant

f = frequency

For the first line;

E = 6.6 * 10^-34 Js * 3.45 x 10^14 Hz = 2.3 * 10^-19 J

Given that;

E = hc/λ

λ = hc/E

λ = 6.6 * 10^-34 * 3 * 10^8/2.3 * 10^-19

λ = 8.61 * 10^-7 m or 861 nm

The color is violet

For the second line;

E = 6.6 * 10^-34 Js * 6.53 xx 10^14 Hz

E = 4.3 * 10^-19 J

E = hc/λ

λ = hc/E

λ =  6.6 * 10^-34 * 3 * 10^8/4.3 * 10^-19

λ = 4.60 * 10^- 7 m or 460 nm

The color is blue

Learn more about emission spectrum:brainly.com/question/13537021

#SPJ1

8 0
1 year ago
Which of the following statements is true? Protons have a mass that contributes significantly to the mass of the atomic nucleus.
Lunna [17]
The following statements from the paragraph are true. Protons have a mass that contributes significantly to the mass of the atomic nucleus. Neutrons have a mass that contributes significantly to the mass of the atomic nucleus. Electrons have a very low mass and are not found in the nucleus but instead are found in surrounding orbits.
3 0
3 years ago
Please help! I'd appreciate it.
jonny [76]

I believe your answer is the second option.

7 0
3 years ago
Read 2 more answers
PLZ HELP ILL GIVE BRAINLIST!
Schach [20]

Answer:

The energy of a wave is inversely proportional to the wavelength of the wave.

As wavelength increases, the energy of the wave decreases.

As wavelength decreases, the energy of the wave increases.

Explanation:

The energy of a wave is directly proportional to the wave's frequency. As frequency increases, so does the energy of the wave.

E\propto f (energy E is proportional to frequency f)

<u>How is this related to wavelength?</u>

Frequency is inversely proportional to wavelength. That means that as frequency increases, wavelength decreases and as frequency decreases, wavelength increases.

f\propto \frac{1}{\lambda} (frequency f is inversely proportional to wavelength \lambda)

Therefore, as wavelength increases, the energy of a wave decreases and as wavelength decreases, the energy of a wave increases.

E\propto f\propto \frac{1}{\lambda}

6 0
3 years ago
A hydrocarbon (an organic compound containing only C and H) is found to be 7.74% H. If the molecular weight is known to be betwe
ivann1987 [24]
The molecular weight is between 70 and 85. Let's accidentally pick some quantity in amid, like 78. 
7.74% of 78 is how many 'u' there are of H: 
78 u * 7.74% = 78 u * .0774 = 6.0372 u 
The only hydrocarbon below that has 6 hydrogens is C6H6. We can even check this answer: 
Total u = 6C + 6H 
= 6(12.01) + 6(1.0079) 
= 78.11 u 
6(1.0079) / 78.11 * 100 = 7.74%
4 0
3 years ago
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