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Dmitry [639]
3 years ago
8

Objects get their colors from reflecting only certain wavelengths when hit with white light. Light reflected from a green leaf i

s found to have a wavelength of 4.90×10^-7. What is the frequency of the light?​
Chemistry
1 answer:
Vesnalui [34]3 years ago
3 0

Answer:

frequency = 6.12× 10¹⁴ s⁻¹

Explanation:

Given data:

Wavelength = 4.90 ×10⁻⁷ m

Frequency = ?

Solution:

Formula:

<em>Speed of wave = frequency × wavelength</em>

Speed of wave = 3 × 10⁸ m/s

<em>Speed of wave = frequency × wavelength</em>

<em>frequency = Speed of wave/wavelength</em>

frequency <em>= </em>3 × 10⁸ m/s / 4.90 ×10⁻⁷ m

frequency = 0.612 × 10¹⁵ s⁻¹

frequency = 6.12× 10¹⁴ s⁻¹

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Question 1. To convert  2.04x10⁸Pa to Torr?

From google, 1 Torr = 133.32Pa

Therefore, 2.04x10⁸Pa = 2.04x10⁸Pa x 1Torr/133.32Pa

                             Pressure = 1.53x10⁶Torr

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Question 3:

Given state 1 : V=5.00L=0.005m³, T=20C= 293K, P = 760mmHg

                                state 2 : V=? T= -50C = 223K, P = 76mmHg

But we are told Pressure is constant, we will use general gas law equation to get V

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Question 4:

Given state 1 : V=4.60L=0.0046m³, T=20C= 293K, P = 365mmHg

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P₁V₁T₂=P₂V₂T₁,  

P₂ = P₁V₁T₂/V₂T₁  

===  365mmHg x 0.0046m³ x 303K/(293K x 0.0024m³)                                          =         723.5mmHg

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3 years ago
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