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3 years ago

Which of the following bonds is the most polar in nature:

1 answer:

6 0

The answer will be (4) HI because the greater the difference of the bonds in electronegativity, the more polar a bond is.

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Photovoltaic cells convert solar energy into electricity. Calculate the wavelength of light (in nm) required for mercury (Φ =7.2

Sholpan [36]

Answer:

275.3 nm is the wavelength of light required for mercury.

Mercury can not be used to generate electricity from the sun because wavelength at which mercury will emit an electron is smaller than 500 nm.

Explanation:

The wavelength of light required for mercury to emit an electron.

The wavelength of the radiation = $\lambda$

Energy required fro mercury to to emit an electron = E

Energy required fro mercury to to emit an electron will the energy if the radiation = E' = $7.22\times 10^{-19} J$

E' = E

To calculate the wavelength of light, we use the equation:

$E=\frac{hc}{\lambda }$

where,

$\lambda$ = wavelength of the light

h = Planck's constant = $6.626\times 10^{-34} Js$

c = speed of light = $3\times 10^8m/s$

$\lambda =\frac{hc}{E}$

$=\frac{6.626\times 10^{-34} Js\times 3\times 10^8m/s}{7.22\times 10^{-19} J}$

$\lambda =2.753\times 10^{-7} m=2.753\times 10^{-7}\times 10^ nm =275.3 nm$

Wavelength of the sun light in the visible region = 500 nm

500 nm > 275.3 nm

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

Less energy < more energy

So, this means that mercury can not be used to generate electricity from the sun.

6 0

3 years ago

Can you help me on my science

svetlana [45]

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8 0

3 years ago

The envelope of air that surrounds the earth is called

svlad2 [7]

Atmosphere is the envelope of air that surrounds the earth.

4 0

3 years ago

Suppose you are performing a titration. at the beginning of the titration, you read the titrant volume as 2.42 ml. after running

Luda [366]

The volume of titrant required for the titration would be 19.81 mL.

Since the burette was not filled to the zero mark during the titration and the level of base titrant was not filled to the 2.42 mL mark. As a result, the difference between the two values represents the total amount of titrant used in the titration.

therefore,

Volume of titrant after running titration - Volume of titrant before running titration = total titrant required for the titration

22.23 - 2.42 = 19.81 mL

What Exactly Is Titration?

Titration is a laboratory technique that uses a solution with known volume and concentration to determine the concentration of an unknown solution. Between the two solutions, an oxidation-reduction reaction or acid-base neutralization occurs, and the known quantities are used to calculate the unknown. The known concentration standard solution is referred to as the titrant or titrator, while the unknown concentration solution is referred to as the titrand or analyte.

Find more on titration at : brainly.com/question/21881827

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5 0

2 years ago

A 100 W light bulb is placed in a cylinder equipped with a moveable piston. The light bulb is turned on for 2.0×10−2 hour, and t

drek231 [11]

Answer:

(a) ΔU = 7.2x10²

(b) W = -5.1x10²

(c) q = 5.2x10²

Explanation:

From the definition of power (p), we have: