Energy, Frequency, and Wavelength

Energy, Frequency, and Wavelength

    1) According to the electromagnetic spectrum, what color has a frequency of 6.95 x 10¹⁴ Hz?

(a) blue

(b) red

(c) orange

(d) green

(e) This frequency does not fall in the visible spectrum.

 

    2) Calculate the energy of one mole of photons for the 589 nm yellow line of the sodium spectrum.

(a) 3.37 x 10^-19 J/mol

(b) 2.35 x 10^-7 J/mol

(c) 2.03 x 10^-4 J/mol

(d) 2.03 x 10⁵ J/mol

(e) 3.37 x 10⁵ J/mol

    3) According to the electromagnetic spectrum, what color has a frequency of 6.12 x 10¹⁴ Hz?

(a) yellow

(b) orange

(c) green

(d) red

(e) This frequency does not fall in the visible spectrum.

 

    4) Calculate the energy of one mole of photons for the 121.6 nm ultraviolet line of the hydrogen spectrum.

(a) 1.63 x 10⁵ J/mol

(b) 9.84 x 10⁵ J/mol

(c) 4.85 x 10^-7 J/mol

(d) 1.63 x 10^-19 J/mol

(e) 9.84 x 10^-4 J/mol

    5) According to the electromagnetic spectrum, what color has a frequency of 1.36 x 10¹⁵ Hz?

(a) yellow

(b) green

(c) orange

(d) red

(e) This light does not fall in the visible spectrum.

 

    6) Calculate the energy of one photon for the 643.8 nm red cadmium line.

(a) 1.86 x 10^-4 J/mol

(b) 3.09 x 10^-19 J/mol

(c) 1.86 x 10⁵ J/mol

(d) 3.09 x 10⁵ J/mol

(e) 2.57 x 10^-7 J/mol

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