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son4ous [18]
3 years ago
7

If an electromagnetic wave has a frequency of 4.5 x 10^18 Hz, what is its wavelength? The speed of light is 3 x 108 m/s.

Chemistry
1 answer:
Mekhanik [1.2K]3 years ago
3 0

Answer:

Wavelength, λ  = 6.7 x 10^-11 m

Explanation:

Frequency and wavelength are inversely proportional to each other.

In this problem;

f =  4.5 x 10^18 Hz

wavelength, λ = ?

Speed of light, c = 3 x 108 m/s.

These variables are related by the following equation;

c = λ * f

Making λ subject of focus, we have;

λ = c / f

λ = 3 x 10^8 / 4.5 x 10^18

λ  = 0.67 x 10^-10

λ  = 6.7 x 10^-11 m

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In which of the following are the symbols and names for the ions given correctly?
Ne4ueva [31]

Answer: Option (A) is the correct answer.

Explanation:

The name of OH^{-} ion is hydroxide.

Name of  PO^{3-}_{3} ion is phosphite.

Name of  PO^{3-}_{4} ion is phosphate.

Name of  NH^{+}_{4} ion is ammonia.

Name of  C_{2}H_{3}O_{2}^{-} ion is acetate.

Name of  C_{2}O_{4}^{-} ion is oxalate.

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Given an equilibrium constant value of 7.2 x 10-4 it is false to say that the reaction proceeds essentially to completion.

<h3>What is the equilibrium constant?</h3>

In a reaction, we can judge using the value of the equilibrium constant weather or not the reaction moves on to completion. If the reaction moves up to completion, it the follows that the value of the equilibrium constant ought to be large.

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Given an equilibrium constant value of 7.2 x 10-4 it is false to say that the reaction proceeds essentially to completion.

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