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RideAnS [48]
3 years ago
13

Identify the total number of protons and neutrons in the nucleus of the most common isotope of manganese

Physics
2 answers:
Usimov [2.4K]3 years ago
8 0
Name: Manganese
Symbol: Mn
Atomic Number: 25
Atomic Mass: 54.93805 amu
Melting Point: 1245.0 °C (1518.15 K, 2273.0 °F)
Boiling Point: 1962.0 °C (2235.15 K, 3563.6 °F)
Number of Protons/Electrons: 25
Number of Neutrons: 30
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 7.43 g/cm3
Color: silverish/grayish
hram777 [196]3 years ago
4 0
The answer is c.55. I don't know how I got it but it was a question on my test and I guessed a I got it right so ⁻\_(⁰⁰)_/⁻

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A bridge spanning a river is 98.0 meters above the water.
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What is the result of increasing the speed at which a magnet moves in and
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What is the relationship between thickness of lens and focal length?​
Ymorist [56]

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3 years ago
A gas has a volume of 8.21 mL and exerts a pressure of 2.9 atm. What new volume will the gas have if the pressure is changed to
labwork [276]

Answer:

5.95 ml

Explanation:

Given info

P1=2.9 atm

V1=8.21 ml

P2=4 atm

From Boyle's law we know that p1v1=p2v2 where p and v are pressure and volume respectively. This is at a constant temperature. Making v2 the subject of formula then

V2=p1v1/p2

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3 0
3 years ago
During a breath, the average human lung expands by about 0.50 l. part a if this expansion occurs against an external pressure of
saveliy_v [14]
Work, in thermodynamics, is the amount of energy that is transferred from one system to another system without transfer of entropy. It is equal to the external pressure multiplied by the change in volume of the system. It is expressed as follows:<span>

W = PdV

Integrating and assuming that P is not affected by changes in V or it is constant, then we will have:

W = P (V2 - V1)

Substituting the given values:
P = 1.0 atm = 101325 Pa
(V2 - V1) = 0.50 L = 
W = 101325 N/m^3 ( 0.50) (1/1000) m^3
W = 50.66 N-m or 50.66 J
<span>
So, in the expansion process about 50.66 J of work is being done.
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</span></span>
8 0
3 years ago
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