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3 years ago

Solids or liquids are not included in an equilibrium expression because:

Chemistry

1 answer:

Harlamova29_29 [7]3 years ago

7 0

I believe the answer is D

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Which example best illustrates a method to show differences among Earth’s layers?

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Carson models how the continental crust varies in thickness. Marisol records atmospheric and oceanic temperatures at several beaches. Eliza analyzes seismic wave activity from an earthquake using a computer model.

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2 years ago

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To vaporize/condense a substance, does the substance have to absorb or release heat?

lilavasa [31]

Answer: it would release heat because the thermal energy it absorbed to become a gas. so it would release heat. hope this helps :)

Explanation:

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2 years ago

Is hardness physical or chemical property

Afina-wow [57]

Answer:

The properties of the Hardness are:

Hardness is a physical property

Hardness is indicative of the strength of chemical bonds between elements.

Diamond can scratch quartz Explanation:

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2 years ago

The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: E = R_y/n^2 In this equation R_y stands

Katarina [22]

Answer:

The wavelength of the line in the emission line spectrum of hydrogen caused by the transition of the electron for the given energy levels is $5.23\times 10^{-5} m$

Explanation:

Given :

The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula:

$E=\frac{R_y}{n^2}$

$R_y=2.18\times 10^{-18} J$ = Rydberg energy

n = principal quantum number of the orbital

Energy of 11th orbit = $E_{11}$

$E_{11}=\frac{2.18\times 10^{-18} J}{11^2}=1.80\times 10^{-20} J$

Energy of 10th orbit = $E_{10}$

$E_{10}=\frac{2.18\times 10^{-18} J}{10^2}=2.18\times 10^{-20} J$

Energy difference between both the levels will corresponds to the energy of the wavelength of the line which can be calculated by using Planck's equation.

$E'=E_{10}-E_{11}=2.18\times 10^{-20} J-1.80\times 10^{-20} J$

$=E'=0.38\times 10^{-20} J$

$\lambda =\frac{hc}{E'}$ (Planck's' equation)

$\lambda = \frac{6.626\times 10^{-34} Js\times 3\times 10^8 m/s}{0.38\times 10^{-20} J}$

$\lambda = 5.2310\times 10^{-5} m\approx 5.23\times 10^{-5} m$

The wavelength of the line in the emission line spectrum of hydrogen caused by the transition of the electron for the given energy levels is $5.23\times 10^{-5} m$

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2 years ago

Why Does Grape Flavor Smell The Way It Is When Actual Grapes Don't Taste Or Smell Anything Like It? I looked up this question an

frez [133]

Answer:

That is a good question... Maybe Because it is artificial and the makers do not know how to mimic nature.

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