Chemistry College

4. What is the energy of a photon that has a wavelength of 400 nm?

Answers

Answer 1

Answer:

4,9725*10⁻¹³[J].

Explanation:

all the details are in the attached picture, answer is marked with orange colour.

4. What Is The Energy Of A Photon That Has A Wavelength Of 400 Nm?

Related Questions

List the three pieces of evidence for sea floor spreading that also support the theory of continental drift

Answers

Answer:

molten material, seafloor drilling, radiometric age dating and fossil ages, and the magnetic stripes

Explanation:

Ethan makes the table below to record his observations when mixing baking soda and vinegar in a beaker. Ethan claims that a chemical change has occurred. Which statement provides the BEST evidence to support his claim?

Answers

Answer: a

Explanation:

Many bubbles formed after mixing.

The statement which best provides support for the fact that a chemical change has occurred is that many bubbles formed after mixing.

In a chemical change, new substances are formed and there is a recombination of the atoms in reactants as the products are being formed.

There are several cues that indicate that a chemical change has taken place such as;

Appearance of a solid in an aqueous phase reaction.Evolution of gasSudden change in the temperature of the systemChange in the color of the system

In the particular instance in this question, when baking soda and vinegar were mixed together, a gas was evolved signifying that a chemical change has taken place.

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Balance the following chemical equation and determine the number of moles of Fe(s) produced when 8.1E-1
moles of Fe2O3(s) react with excess C(s) to produce Fe(s) and CO2(g).
Fe2O3(s) + C(s) ——)Fe(s) + CO2(g)

Answers

Answer:

2Fe2O3 + 3C → 4Fe + 3CO2

Explanation:

The balanced reaction of Ferric oxide with carbon to form Iron and Carbon dioxide can be written as follows:

[tex]2Fe_{2} O_{3} +3C\rightarrow4Fe+3CO_{2}[/tex]

The moles of iron produced is[tex]16.2*10^{-1}[/tex]

What is balanced equation?

Balanced equation is the one where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be created nor be destroyed.

The atoms of Oxygen on reactant side is 3 while on product side is 2 so multiply Ferric oxide by 3 and carbon dioxide by 3

so now our equation becomes

[tex]2Fe_{2} O_{3} +C\rightarrow Fe+3CO_{2}[/tex]

The number of Carbon atoms on left side is one while on right side it is 3 so multiply by 3

[tex]2Fe_{2} O_{3} +3C\rightarrow Fe+3CO_{2}[/tex]

The number of Iron atoms on left is 4 while on right it is 1 so multiply by 4

[tex]2Fe_{2} O_{3} +3C\rightarrow4Fe+3CO_{2}[/tex]

From 2 moles of Ferric oxide 4 moles of iron is produced

from 1 mole mole of ferric oxide 2 moles of Iron is produced

From [tex]8.1*10^{-1}[/tex] mole of ferric oxide 2×[tex]8.1*10^{-1}[/tex] moles of iron are produced.

Hence the balanced equation is

[tex]2Fe_{2} O_{3} +3C\rightarrow4Fe+3CO_{2}[/tex]

the number of mole of Iron is [tex]16.2*10^{-1}[/tex]

Learn more about the balanced equations, here:

https://brainly.com/question/7181548

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When the metallic element sodium combines with the nonmetallic element bromine (Br2), is the product a solid, liquid, or gas at room temperature?

I will give brainliest if you can explain how one would know this information.

Answers

Answer: it is a solid at room temperature.

Explanation:

The ions of the two reactants are Na{+} and Br{-}, so the formula of the product is NaBr.

and when the NaCl is a solid a room temperature. and when NaBr has similar properties to NaCl, so NaBr is a solid at room temperature too.

so our chemical formula for the product is NaBr and It's a solid at room temperature.

Determine the formal charge on each atom in the structure.

Answers

Answer:

−0.75 , 1.25

Explanation:

Please refer to attachment for more information

How many atoms are present in 0.529 moles of Li?

Answers

Answer:

3.18 × 10²³ atoms

Explanation:

The number of atoms can be found by using the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 0.529 × 6.02 × 10²³

We have the final answer as

3.18 × 10²³ atoms

Hope this helps you

The total pressure in a mixture of gases is equal to the partial pressure(s) of ________. the gas that occupies the largest volume the gas with the smallest number of moles all the gases added together the gas with the highest molecular weight the gas with the greatest number of moles

Answers

The total pressure in a mixture of gases is equal to the partial pressure of all the gases added together

According to Dalton's Law of Partial Pressure, The total pressure exerted by a mixture of gases which are non reacting is equal to the sum of the partial pressure of each individual gas that make up the mixture

Mathematically, Ut can be written as

P{total}= p1+p2, ....+ pn

where p1, p2, …, pn are partial pressures of each gas component.

For example :A gaseous mixture consisting of Helium and Nitrogen gas . If the pressure exerted by He is 3 atm while Nitrogeb exerted is 9 atm. The total pressure will be:

P{total}= p1+p2, ....+ pn

P{total}= 3+9

P{total}= 12

See more here: https://brainly.com/question/14119417

Vitamin D is produced in the skin when 7-dehydrocholesterol reacts with UVB rays (ultraviolet B) having wavelengths between
270 nm and 300 nm. What is the energy range of the UVB photons?

Answers

UVB photons, with wavelengths between 270 nm and 300 nm, have energies in the range of 6.63 × 10⁻¹⁹ J - 7.37 × 10⁻¹⁹ J.

UVB rays have wavelengths (λ) between 270 nm and 300 nm. We can calculate the energy (E) associated with each wavelength using the Planck-Einstein's relation.

[tex]E = \frac{h \times c}{\lambda }[/tex]

where,

h: Planck's constant (6.63 × 10⁻³⁴ J.s)c: speed of light (3.00 × 10⁸ m/s)

The energy associated with a wavelength of 270 nm is:

[tex]E = \frac{h \times c}{\lambda } = \frac{(6.63 \times 10^{-34}J.s ) \times (3.00 \times10^{8}m/s )}{270 \times 10^{-9}m } = 7.37 \times 10^{-19} J[/tex]

The energy associated with a wavelength of 300 nm is:

[tex]E = \frac{h \times c}{\lambda } = \frac{(6.63 \times 10^{-34}J.s ) \times (3.00 \times10^{8}m/s )}{300 \times 10^{-9}m } = 6.63 \times 10^{-19} J[/tex]

Living things are made up of cells in which there are two types of living cells. We have the unicellular and multicellular cells.

The unicellular are made up of one cell (single cell) the unicellular organisms are simple cells which make their functions simple while the multicellular organisms are made up of two or more organisms and their functions are special unlike the unicellular which the functions are simple

Explanation:

Answer:

Hey there

A) how they are organized.

Multicellular organisms are organized by being made of many cells, such as you and me. However unicellular organisms as the name suggest are made of only one cell, such as bacteria.

An adult human lungs can only hold a volume of up to 6.0 L of air when fully expanded. Suppose that at sea level where the pressure is 1.00 atm, a sky diver traps 3.0 L of air in her lungs and holds her breath before rapidly ascending to an altitude where the pressure drops to 0.46 atm. If she doesn't exhale, determine if her lungs will rupture at this high altitude, then complete the sentence:

Answers

Answer:why would i know

1. What is the purpose of the advertisement?

Answers

Answer:

For enlightenment, development and making people understand the usefulness of the product

Answer:

AKA "AD"AND ADS EXPLAIN WAYS IN WHICH THE PRODUCT IS USEFUL ... PLEASE MARK ME AS BRAINLIST

How many mols are present in 5.24 x 1024 atoms of Carbon tetra fluoride?

Answers

Answer: 5.44×10226.022140857(74)×1023⋅mol−1.

Explanation: So the answer is approx. 0.10⋅mol

what force/ area causes gas pressure

Answers

Answer:

i would think its rapid motion and collision of molecules causing pressure.

Explanation:

it depends on the number so the more gas molecules collide, the more pressure there is. sorry if this doesn't help.

Answer:

collisions of gas particles with the walls of the container.

Explanation:

Which gases contribute more significantly to Global warming

Answers

Answer:

Carbon dioxide

Explanation:

A byproduct of fossil fuel combustion, is the principal greenhouse gas contributing to global warming. However, other greenhouse gases including methane, nitrous oxide, and a number of industrial-process gases also are important contributors to climate change.

Calculate the entropy change for the gas. (2b)Calculate the entropy change when 14 g of nitrogen expand from a volume of 10 L to a volume of 30 L at the same temperature. Assuming ideal behaviour for the nitrogen gas

Answers

Explanation:

because T is const so

deltaS=Q/T=nRLn(V2/V1)

=(14/28)x8.314xLn(30/10)=4,567 J/k

Perform the following calculation and report the answer with the correct number of significant figures.
81.72 +0.73 =

Answers

Answer:

81.72 +0.73=82.45

Explanation:

you need to add it

81.72

+0.73

= 82.45

82.72 + 0.73 = 82.45

Explanation:

0.72+0.73 = 1.45

Therefore 81+1.45= 82.45 ( Integer in addition with a decimal number).

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