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2 years ago

Compared to infrared radiation, an electromagnetic wave that has a lower frequency will also have a ________.

1 answer:

8 0

Compared to infrared radiation, an electromagnetic wave that has a lower frequency will also have a longer wavelength and equal speed

<h3>What is Electromagnetic wave ?</h3>

Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field.

It can be also defined as waves are composed of oscillating magnetic and electric fields.

One important feature fo electromagnetic radiation is that all have the same speed in vacuum, c, in vacuum, which is the speed of light.

Since, the speed, wavelength and frequency of the waves are related you can infere any of them when the other two are known.

The equation is:

speed = frequency × wavelength

s = ν × λ

c = ν × λ . . . for the specific case of electromagnetic radiation

That inverse relation between frequency and wavelength, where the speed is the constant, shows that the lower the frequency the longer the wavelength.

Therefore, the correct statment is that an an electromagnetic wave that has a lower frequency will also have a longer wavelength and equal speed (option B).

Learn more about Electromagnetic wave here ;

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pishuonlain [190]

Answer:

Explanation:

Li(s)+1/2 F₂(g)→LiF(s)

In this reaction one mole of product is formed from gaseous state of reactants . So this reaction will represent the reaction for which ΔH∘rxn equals to ΔH∘f .

In other reaction one mole is not produced if we balance the reaction. The reactant must be in gaseous state . ΔH∘f . represents heat of formation . ΔH∘rxn represents heat of reaction .

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3 years ago

Locate the ion that has no change in oxidation number in redox reactions.

natali 33 [55]

a. Spectator ions are the ones that are present but does not enter into the actual chemical reaction.

b. Na⁺ and NO₃⁻ ions are spectator ions involved in this above mentioned reaction

<u>Explanation:</u>

In redox reactions, for example reaction of aqueous silver nitrate and aqueous sodium chloride, silver chloride settles down as a precipitate by the addition of Ag⁺ ion from AgNO₃ and Cl⁻ ions from NaCl .
The other 2 ions that is NO₃⁻ ion and Na⁺ ion in the reaction do not enter into the reaction and they are called as Spectator ions.

This can be expressed as the following equation,

AgNO₃(aq) + NaCl(aq) →AgCl(s) + NaNO₃

5 0

4 years ago

Resistance is caused by _________________in a current bumping into electrons and ions in the matter through which the current is

zysi [14]

The answer is protons

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4 years ago

If a trait varies greatly within a pair of identical twins, it is most likely caused by what?

notsponge [240]

Answer:

1. B. environment

2. A. true

Explanation:

6 0

3 years ago

The following is a list of weak acids and their Ka values.HOCl hypochlorous acid 3.5 x 10^-8H2S hydrogen sulfide 1.1 x 10^-7HCN

notsponge [240]

Answer:

(a) HNO₂ nitrous acid 4.5 x 10^-4 is strong acid

(b) Ka expression $Ka = \frac{[H^{+}][NO_{2} ^{-}] }{[HNO_{2}] }$

(c) List of Conjugate Bases

OCl⁻, S²⁻, CN⁻, NO₂⁻

(d) cyanide ion is strongest conjugate base.

(e) pH and pOH of Hypochlorous acid = 4.22 & 9.77

pH and pOH of hydrogen sulfide = 4 & 10

pH and pOH of hydrocyanic acid = 5.2 & 8.79

pH and pOH of nitrous acid = 2.17 & 11.8

Explanation:

(a) Ka and acidity are directly proportional to each other

hence nitrous acid is the strongest acid since it has highest Ka value.

(b) Ka expression of nitrous acid

HNO₂ → H⁺ + NO₂⁻

⇒ $Ka = \frac{[H^{+}][NO_{2} ^{-}] }{[HNO_{2}] }$

H₂S hydrogen sulfide = S²⁻(sulphide ion)

HCN hydrocyanic acid = CN⁻(cyanide ion)

HNO₂ nitrous acid = NO₂⁻(nitrite ion)

<u>(d) We know according to Bronsted acid base concept Weak acid have strongest conjugate base</u>

according to this hydrocyanic acid is weak acid so the corresponding conjugate base i.e. cyanide ion is strongest conjugate base.

5 0

3 years ago