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emmainna [20.7K]
3 years ago
10

someone has left a shiny metal bowl outside in the sun. Which may have the potential to damage your eyes: looking at the outside

of the bowl or the inside of the bowl? Explain
Chemistry
1 answer:
wel3 years ago
7 0

Answer:

Looking at the inside of the bowl

Explanation:

The curvature of the bowl would likely focus the light to a single point or area above it. This higher intensity area would be more dangerous to look at.

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The ratio of the heights 1.50 m and 75 cm of two persons can be written as ​
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What is the wavelength in picometers for an electron with 360 eV of kinetic energy?
Rom4ik [11]

Answer:

Wavelength = 64.635 pm

Explanation:

The expression for the deBroglie wavelength and kinetic energy is:

\lambda=\frac {h}{\sqrt{2\times m\times K.E.}}

Where,  

\lambda is the deBroglie wavelength  

h is Plank's constant having value 6.626\times 10^{-34}\ Js

m is the mass of electron having value 9.11\times 10^{-31}\ kg

K.E. is the kinetic energy of the electron.

Given, K.E. = 360 eV

Energy in eV can be converted to energy in J as:

1 eV = 1.6022 × 10⁻¹⁹ J

So, K.E. = 360\times 1.6022\times 10^{-19}\ J=5.76792\times 10^{-17}\ J

Applying in the equation as:

\lambda=\frac {h}{\sqrt{2\times m\times K.E.}}

\lambda=\frac{6.626\times 10^{-34}}{\sqrt {{2\times 9.11\times 10^{-31}\times 5.76792\times 10^{-17}}}}\ m

\lambda=\frac{10^{-34}\times \:6.626}{\sqrt{10^{-48}\times \:105.0915024}}\ m

\lambda=6.4635\times 10^{-11}\ m

Also, 1 m = 10¹² pm

<u>So, Wavelength = 64.635 pm</u>

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Use Lewis Dot diagrams to illustrate the formation of a covalent bond between
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Answer:

bromine has 7 electron valenc because bromine in group VIIA

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