Why does red appear first in the visible light spectrum? A Red light has the shortest wavelength, so it is refracted the least. B Red light has the shortest wavelength, so it is refracted the most. C Red light has the longest wavelength, so it is refracted the most. D Red light has the longest wavelength, so it is refracted the least.

Answers

Answer 1

Answer:

The red light appears first in the visible light spectrum as it exhibits the longest wavelength, and is refracted the least.

The relation between wavelength and refraction of light:

The phenomenon of bending of light as it moves from one medium to another is termed refraction. The intensity of refraction enhances with the decrease in the wavelength of light. The shorter wavelengths of light, that is, blue and violet are slowed more and at the same time experience more bending in comparison to the lights of longer wavelengths, that is, red.

The red color exhibits the longest wavelength and the slowest vibration, on the other hand, violet color exhibits the shortest wavelength and the fastest vibration of energy. The longer the wavelength, the less it is refracted and vice versa, This is the reason that red light appears first in the visible light spectrum.

Thus, the correct answer is option D.

Find out more information about the relation between wavelength and refraction here:

brainly.com/question/15906061

Answer 2

Answer:

Answer:

Explanation:

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Count the number of neutrons in Cesium-130/55 (Cs) A. 55 B. 75 C. 130 D. 185

Answers

The answer to the question is letter B which is 75. Cesium or also called as cesium is a chemical element with the symbol Cs. It is a silvery-gold element which is soft alkalai metal with melting point of 28.5 C.

the given element is

¹³⁰₅₅Cs

the superscript - 130 is the atomic mass / mass number

mass number is the sum of protons and neutrons

subscript - 55 is the atomic number

atomic number is the number of protons

therefore we can write the following equations

protons = 55

protons + neutrons = 130

so neutrons = 130 - protons

nuetrons = 130 - 55 = 75

number of neutrons = 75

Hemoglobin is a substance which allows the red blood cells to carry .oxygen,carbonmonoxide,nitrogen,water

Answers

It allows your blood to carry oxygen. #TeamAlvaxic

oxygen is the answer

Which of the following is a synthesis reaction?C2H4 + 3O2 yields 2CO2 + 2 H2O

2HCl yields H2 + Cl2

2K + 2HCl yields 2KCl + H2

SO3 + H2O yields H2SO4

Answers

SO3+H2O yields H2SO4 is the correct answer for your question, WELCOME:)

the last one is the answer to your question. D is the answer

A sample of gas at 25ºc has a volume of 11 l and exerts a pressure of 660 mm hg. how many moles of gas are in the sample?

Answers

The moles of the gas in the sample is 0.391 moles

calculation
by use of ideal gas equation, that is Pv=nRT
where n is number of moles
P(pressure)= 660 mmhg
R(gas constant) = 62.364 l.mmhg/mol.K
T(temperature)= 25 +273 = 298 k

by making n the subject of the formula

n= Pv/ RT

n is therefore= (660mm hg x11 L)/( 62.364 L.mmhg/mol.k x298 K) = 0.391 moles

The reaction between C2H6 and Cl2 is by addition

Answers

The reaction between C2H6 and Cl2 by addition is C2H4Cl2 or dichloroethane. It must be under the presence of sunlight because halogen such as chlorine cannot easily react with the sigma bond of alkane such as ethane.

Answer:

addition

Explanation:

According to VSEPR theory, what causes water molecules to have a bent shape? A. the unusual location of the free electrons. . B. repulsive forces between specific lone pairs of electrons. . C. attraction between the fixed orbitals of the unshared pairs of oxygen electrons. . D. ionic attraction and repulsion

Answers

According to VSEPR theory, what causes water molecules to have a bent shape?

Answer: Out of all the options presented above the one that best represents what causes water molecules to have a bent shape according to VSEPR theory is answer choice B) repulsive forces between specific lone pairs of electrons. the bond angle in a water molecule is bent.

I hope it helps, Regards.

The correct answer is $\boxed{{\text{option }}\left( {\text{B}} \right)}$ that is repulsive forces between specific lone pairs of electrons.

Further Explanation:

The total number of valence electrons of ${{\text{H}}_2}{\text{O}}$ is calculated as,

Total valence electrons (TVE) = [(1) (Valence electrons of O) + (2) (Valence electrons of H)]

$\begin{aligned}{\text{Total valence electrons}}\left( {{\text{TVE}}}\right)&=\left[{\left({\text{1}}\right)\left({\text{6}}\right)+\left({\text{2}}\right)\left({\text{1}}\right)}\right]\n&=8\n\end{aligned}$

In ${{\text{H}}_2}{\text{O}}$ , the total number of valence electrons is 8. Here, oxygen forms single bond with the hydrogen atom and therefore, 2 pair of electrons are used in the formation of two single bonds with hydrogen atom. Remaining 2 pair of electrons are used to complete the octet of oxygen atom. Therefore, ${{\mathbf{H}}_{\mathbf{2}}}{\mathbf{O}}$ contains two bond pairs and two lone pairs (refer to the image attached).

According to the VSEPR theory, central atom oxygen has two bond pair with two lone pair, therefore, ${{\text{H}}_2}{\text{O}}$ has an ${\text{A}}{{\text{B}}_2}{{\text{E}}_2}$ arrangement. Therefore, these four pairs of electrons spread out as tetrahedral arrangement to minimize lone pair-lone pair and bond pair-bond pair repulsion. Since lone pairs are not considered in the shape of the molecule and therefore, the final shape of water molecule is bent-shape.

Learn more:

1. Molecular shape around the central atom in the amino acid glycine: brainly.com/question/4341225

2. Balanced chemical equation: brainly.com/question/1405182

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Covalent bonding and molecular structure

Keywords: hybridization, water, geometry, sp3, steric number, 3, p orbital, s orbital, Lewis structure, hybridization of water, central atom, carbon, hydrogen, oxygen, shape, double bond, h2o.

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