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MrRissso [65]
3 years ago
12

Which is the best predictor of the radioactive nature of an isotope?

Physics
2 answers:
frutty [35]3 years ago
8 0

Answer:

B. The neutron-to-proton ratio

Explanation:

ale4655 [162]3 years ago
7 0
The answer is <span>the neutron-to-proton ratio</span>
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A piston of volume 0.1 m3 contains two moles of a monatomic ideal gas at 300K. If it undergoes an isothermal process and expands
seropon [69]

Answer:

the work is done by the gas on the environment -is W= - 3534.94 J (since the initial pressure is lower than the atmospheric pressure , it needs external work to expand)

Explanation:

assuming ideal gas behaviour of the gas , the equation for ideal gas is

P*V=n*R*T

where

P = absolute pressure

V= volume

T= absolute temperature

n= number of moles of gas

R= ideal gas constant = 8.314 J/mol K

P=n*R*T/V

the work that is done by the gas is calculated through

W=∫pdV=  ∫ (n*R*T/V) dV

for an isothermal process T=constant and since the piston is closed vessel also n=constant during the process then denoting 1 and 2 for initial and final state respectively:

W=∫pdV=  ∫ (n*R*T/V) dV =  n*R*T  ∫(1/V) dV = n*R*T * ln (V₂/V₁)

since

P₁=n*R*T/V₁

P₂=n*R*T/V₂

dividing both equations

V₂/V₁ = P₁/P₂

W= n*R*T * ln (V₂/V₁)  = n*R*T * ln (P₁/P₂ )

replacing values

P₁=n*R*T/V₁ = 2 moles* 8.314 J/mol K* 300K / 0.1 m3= 49884 Pa

since P₂ = 1 atm = 101325 Pa

W= n*R*T * ln (P₁/P₂ ) = 2 mol * 8.314 J/mol K * 300K * (49884 Pa/101325 Pa) = -3534.94 J

5 0
3 years ago
How many digits are in front of the decimal in scientific notation?
nikklg [1K]

Answer:

1

Explanation:

How many digits are in front of the decimal in scientific notation?

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What’s the equalibrium rule?
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The vector sum of forces acting on a non-accelerating object equals zero.
equation form: ΣF = 0
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Thorium-232 decays by alpha decay. Part of the nuclear equation is shown below. Fill in the blank with a number. 232/90
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its 228 on my apex......

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the potential at a point A is 30 V higher than at point B. How much work would you do moving 4.0 C charge from B to A?
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the answer would be 26

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