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WINSTONCH [101]
3 years ago
7

A certain shade of blue has a frequency of 7.26 × 1014 Hz. What is the energy of exactly one photon of this light?

Chemistry
2 answers:
iogann1982 [59]3 years ago
8 0

Answer:

Energy of one photon = 4.81\times 10^{-19}J

Explanation:

Frequency = 7.26\times 10^{14}\ Hz

Energy of a photon is given by:

E = hν

Where,

h = Plank's constant

ν = Frequency

h = 6.626\times 10^{-34}J\ s

ν = 7.26\times 10^{14}\ Hz\ or\ 7.26\times 10^{14}\ s^{-1}

E = hν

   =(6.626\times 10^{-34}Js)\times (7.26\times 10^{14}\ s^{-1})\\=4.81\times 10^{-19}J

Energy of one photon = 4.81\times 10^{-19}J

Gekata [30.6K]3 years ago
6 0
7.20 it the energy because


10\7.26 is 7.20
- 70
26
-20
6
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The smallest unit that can exist as an element and still have the properties of that element is a(n): electron proton neutron at
Alex

Answer:

Atom

Explanation:

An atom is the smallest quantity of any given element.

An atom includes a nucleus (which includes protons and neutrons) around which are located the electrons.  That's that specific assembly of nucleus and surrounding electrons that form an atom and define which element it is.

So,

electron: negative charge in orbit of the nucleus

proton: positively-charged particle inside the atomic nucleus

neutron: neutral particle inside the atomic nucleus

atom: ensemble of the nucleus and electrons, defining a given element.

4 0
3 years ago
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Given the following equation: 2H2O 2H2 +0g What mass of oxygen would form from 5 moles of water?​
Anna35 [415]

Answer:

Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.

Explanation:

6 0
2 years ago
Until the 1960s, it was widely believed that the Moon was made of material that was flung off Earth during a time when it was ra
zysi [14]

E

All the other chices give evidence that supports that hypothesisthat the Moon was made of material that was flung off Earth during a time when it was rapidly spinning.

Explanation:

There is an enormous amount of similarities between the minerals in the moon rocks and the rocks on earth, except that for some minerals, like potassium, their quantities are higher on the earth than on the moon.

However, there is still supports for the evidence (by the other choices) that the moon was made from a piece of earth ejected from asteroid impact in primordial earth.Explanation:It’s believed that more than 3.5 billion years during the formation of earth and before it had cooled there were frequent asteroid impacts and one enormous collision ejected a large piece of molten earth into space but within earth’s gravity influence. This piece formed the moon. Evidence of asteroid impacts are frozen in time on the moon surface thanks to the fact that the moon has no atmosphere or tectonic plates movements that wipe off this ‘evidence’.

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8 0
2 years ago
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What is the wavelength, in nanometers, of light with a frequency of 1.97x10^15 Hz?
Iteru [2.4K]
*v=c/λ
λ = 3*10^8 m/s /1.97 *10^15
λ = 1.5 *10^-7
The calculated wavelength is in unit of meter. use the relationship between meter and nanometer to convert to the correct units.
4 0
2 years ago
N2 + 3H2 → 2NH3 How many grams of hydrogen are necessary to react completely with 853.42g of nitrogen in the above reaction?
GarryVolchara [31]

Answer: 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.

Explanation:

The balanced chemical reaction is :

N_2+3H_2\rightarrow 2NH_3

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}  

\text{Number of moles of nitrogen}=\frac{853.42g}{28g/mol}=30.479moles

According to stoichiometry:

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Thus 182.87 grams of hydrogen are necessary to react completely with 853.42g of nitrogen.

4 0
3 years ago
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