Chem Practice Exam

A certain photon of light has a wavelength of 4.22x10^-7nm. What is the frequency? (v=c/λ)

• 7.11x10¹⁴ Hz
• 7.11Hz
• 1.41x10^-15
• -1.41x10¹⁵

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Which has the LONGEST wavelength and, therefore, the lowest frequency/energy

• Gamma Rays
• Radio Waves
• Visible Light
• Infrared rays

As the frequency of an electromagnetic wave increases, the amount of energy in that wave...

• increases.
• decreases.
• stays the same.

The height of the wave is known as the _____________.

• amplitude
• crest
• trough
• wavelength

What is the energy of a quantum of light with a frequency of 7.39x10¹⁴Hz.(E=Hv)

• 4.88x10¹⁹
• 4.88x10^-19
• 2.22x10²³
• 2.22x10^-23

Certain blue lights have a frequencey of 6.91x10¹⁴Hz. What is the wavelength? (λ=c/v)

• 4.34x10²¹
• 4.34x10^-21
• 4.34x10^-7
• 2.07x10²³

What is the wavelength for a quantum of light with energy of 7.56x10^-19J? (λ=hc/E) 

• 2.62x10^-7m
• 2.62x10⁷m
• 2.64x10^-45m
• 2.64x10⁴⁵m

On a graph, which axis shows the independent variable?

• x-axis
• y-axis
• neither
• it changes

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound