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svetoff [14.1K]
4 years ago
9

After being ignited in a Bunsen burner flame, a piece of magnesium ribbon burns brightly giving off heat and light in this situa

tion the Bunsen burned flame provides
Chemistry
1 answer:
Ghella [55]4 years ago
3 0
Magnesium reacts with oxygen present in air to produce magnesium oxide;

                                     2 Mg  +  O₂    →     2 MgO

This reaction doesn't start on its own but requires a initiation energy called activation energy. When provided with this activation energy with the help of Bunsen burner it will start a spontaneous reaction because the further energy required for reaction is generated by itself.
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a bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy, in joules, must be rel
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<h3>Answer:</h3>

4.56 × 10^-19 Joules

<h3>Explanation:</h3>

We are given;

  • Wavelength of the wave as 435.8 nm

We are required to calculate the amount of energy released by an electron.

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E = hf , where h is the plank's constant, 6.626 × 10^-34 J-s

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Thus;

Energy = 6.626 × 10^-34 J-s ×6.879 × 10^14 Hz

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            =  4.56 × 10^-19 Joules

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