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AleksandrR [38]
3 years ago
5

How do you calculate the number of photons having a wavelength of 10.0 micrometers required to produce 1.0 kilojoules of energy

Chemistry
1 answer:
shtirl [24]3 years ago
4 0

To calculate this,

We know that energy is 1 photon 
E = hc/wavelenth 
wavelength of 10.0 m 

Solution:
h = 6.626 x 10^-34 Jsec 
C = 2.9979 x 10^8 m/sec 
E = 6.626 10^-34 * 2.9979 10^8 / 10 = 1.9864 10^-26J 

Then, the number of photons is computed by:

n = 1000 / 1.9864 10^-26 = 5.04 10^28 photons 

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Which of the following describes an impact of the specific heat of water on the planet?
Maru [420]

Answer:

Islands and coastal places have moderate pleasant climates.

Explanation:

The specific heat of water is high as compared to most common substances. The high specific heat means that it takes lot of time to heat the water. As a consequence in coastal areas, during day, the land gets heated quickly than water.

The air above land gets heated up and due to low density, rises. The air above water which is cool rushes to take its place. The wind moves sea towards land- sea breeze. At night, the land and air above it is cooler as compared to air above water. The wind blows from land towards sea - Land breeze.

Due to sea breeze and land breeze, islands and coastal places have moderate pleasant climates.

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3 years ago
An electron in an atom is known to be in a state with magnetic quantum number . What is the smallest possible value of the princ
nlexa [21]

Answer:

Hi

Each electron in an atom is characterized by four numbers that arise from the resolution of Schrödinger's equations. These numbers are called quantum numbers. Each energy level corresponds to a main known quantum number, which is represented by the letter n. This number gives an idea of the location of an energy level with respect to the nucleus. The higher n, the mayor will be the energy of that level and the farther away from the nucleus is removed.

In each energy level there may be sub-levels. Each of them is specified by another quantum number called secondary, specified with the letter l. The value of this quantum number can vary from zero to n-1. For example, in the first energy level, the quantum number can only take a value that is zero, while in the second level, it can take a value between zero or one. Then, it can be said that the values of the quantum number n indicate the size of the orbital, that is, its proximity to the nucleus; and the values of the quantum number l variables the orbital:

• If l = 0, the orbital is of type s.

• If l = 1, the orbitals are of type p.

• If l = 2, the orbitals are of type d.

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Explanation:

8 0
3 years ago
How long will it take for a 40.0 gram sample of I-131 (half-life = 8.4 days) to decay to 1/16 its original mass?
Shtirlitz [24]

Answer:

42 days

Explanation:

Half life = 8.4 days

Starting mass = 40.0 g

Time = ?

Final Mass = 1/16 * 40 = 2.5 g

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Second Half life;

Remaining mass = 20 / 2 = 10g

Third Half life;

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Fourth Half life;

Remaining mass = 5 / 2 = 2.5g

Time = Number of half lives * Duration of half life = 5 * 8.4 = 42 days

6 0
2 years ago
3. Why are nutrients needed for living things? Describe the difference between living and nonliving things.
igor_vitrenko [27]
Nutrients are synthetic substances found in each living thing on Earth. They are important to the existences of individuals, plants, animals, and any remaining organisms. Nutrients assist break with bringing down food to give organisms energy. ... The main nutrients they need are carbon, hydrogen, and oxygen.
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3 years ago
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Explanation:

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