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lozanna [386]
3 years ago
9

When electrons move from the fourth energy level to the second energy level , they emit visible light. Why is the light emitted

when an electron makes this move in a sodium atom is a different color than the light emitted by an electron moving from the fourth to the second level of a hydrogen atom?
Chemistry
1 answer:
Pani-rosa [81]3 years ago
4 0
The light emitted by the moving electrons of different atoms or elements differ in color because they also emit different energies. In the visible spectrum of color waves, a certain wavelength or energy corresponds to a specific color. 
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Determine the mass of Al(C2H3O2)3 that contains 2.63 Χ 1024 atoms of oxygen.
sergejj [24]

The molecular formula of compound is Al(C_{2}H_{3}O_{2})_{3}.

Since, in 1 mole of  Al(C_{2}H_{3}O_{2})_{3} there are 6.023\times 10^{23} atoms of  Al(C_{2}H_{3}O_{2})_{3}.

Thus, according to molecular formula, in 1 mole of  Al(C_{2}H_{3}O_{2})_{3} there are 6\times 6.023\times 10^{23}=3.61\times 10^{24} atoms of oxygen atoms.

1 atom of oxygen will be present in \frac{1}{3.61\times 10^{24}} moles of Al(C_{2}H_{3}O_{2})_{3} . Thus,

2.63\times 10^{24} atoms of oxygen \rightarrow \frac{2.63\times 10^{23}}{3.61\times 10^{24}}= 0.7285 moles of Al(C_{2}H_{3}O_{2})_{3}.

Molar mass of Al(C_{2}H_{3}O_{2})_{3} is 236 g/mol, mass can be calculated as follows:

m=n\times M=0.7285 mol\times 236 g/mol=172 g

Therefore, mass of Al(C_{2}H_{3}O_{2})_{3} will be 172 g.

5 0
3 years ago
Read 2 more answers
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