(3) Electronegativity decreases and metallic properties increase is your answer.
Answer : The molecular formula of the compound is,
Explanation :
Molecular formula : It is the representation of substance by the symbols and it denotes the number of atoms of each element present in the compound.
Now count the number of carbon, hydrogen, nitrogen and oxygen atoms present in the given compound.
As we see that in the given compound, there are 8 atoms of carbon element, 3 atoms of oxygen element, 1 atom of nitrogen element, 9 atoms of hydrogen element.
Thus, the molecular formula of the compound will be
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Answer:</h3>
1.54 × 10^-24 J
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Explanation:</h3>
- A microwave is an example of an electromagnetic wave which travels with the speed of light.
We are given;
The wavelength of microwave as 12.9 cm
But, 100 cm = 1 m
Therefore, the wavelength = 0.129 m
- To calculate the energy of the wave we use the formula, E = vh, where v is the frequency and h is the plank's constant, 6.626×10^-34 J-s
- But, v = c/λ, where λ is the wavelength and c is the speed of light, 2.998×10^8 m/s.
Therefore;
E =(c/λ)h
= (2.998×10^8 m/s÷0.129)×6.626×10^-34 J-s
= 1.54 × 10^-24 J
Therefore, the energy of one photon is 1.54 × 10^-24 J