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kolezko [41]
3 years ago
7

What causes the recognition of an element from its energy signature?

Chemistry
1 answer:
Helga [31]3 years ago
8 0

Answer:

I'm so sorry if this is wrong but I think its B

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An electron in the n = 3 energy level of the hydrogen atom emits a photon with wavelength 656.27 nm. What is the change in energ
Lady_Fox [76]

Answer:change in energy of the electron=3.052x 10^-19J

which energy level does it move= level 2 , n=2

Explanation:

Using the formulae

1/λ = R (1/n1²- 1/n2²)

Where λ= 656.27 nm

1 nm = 1 x 10^-9 m

656.27 nm = 656.27 x 1 x 10^-9 =6.5726 x 10^-7

R =Rydberg constant = 1.0967 x 10^7m-1

1/λ = R (1/n1²- 1/n2²)

1/6.5726 x 10^-7=1.0967 x 10^7(1/n1²- 1/3²)

1/n1²=(1/6.5726 x 10^-7 x   1/1.0967 x 10^7) + 1/9

1/n1²=1,521,467.9 x 9.118x10^-8 + 0.1111

1/n1² =0.2498

n1²= 1/0.2498 =4

n1= \sqrt{4} = 2

it moves to energy level 2

b) Change in energy =ΔE = Rhc (1/n1²- 1/n2²)

Where R==Rydberg constant = 1.0967 x 10^7m-1

h = Planck constant = 6.626x 10^-34js

c = speed of light = 3.0 x 10^8 x m/s

ΔE = Rhc (1/n1²- 1/n2²)

=1.0967 x 10^7m-1 x6.626x 10^-34js X 3.0 x 10^8 x m/s (1/2² - 1/3²)

=2.18 x 10-18 x ( 1 /4 - 1/9)

=3.052x 10^-19J

7 0
3 years ago
An atom with one valence electron combines with an atom with seven valence electrons. What is likely to happen to the atom with
labwork [276]
It will likely give up its valence electron to the other compound, forming stable octets on each of the newly formed ions. These ions have opposing charges, and tend to form strong ionic lattices. A good example of this is NaCl, which contains Na+ ions that have given up their one valence electron and Cl- ions which have accepted that electron.
Hope this helps!
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In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water:
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Explanation:

in the presence of excess oxygen methane burns to prduce carbon (iv) oxide and water ....this is called complete combustion...

6 0
3 years ago
9.11 moles of vanadium to atoms
marshall27 [118]
Using the Avogadro's number (6.022*10^23)

9.11* (6.022*10^23)= 5.49*10^24 atoms of V
3 0
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explain how two substances can be at different temperatures but still have the same amount of thermal energy. give an example
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Two objects having the same internal energy may have different temperatures if their masses and specific heats are different and it's possible that an object with more eternal energy may be at a lower temperature than the one with less internal energy.
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2 years ago
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