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Korvikt [17]
3 years ago
13

Which of the following would most likely contain a fossil?

Chemistry
1 answer:
Murljashka [212]3 years ago
6 0
The correct answer would be limestone
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Why is helium trapped in the earth's crust? If it's its trapped in the earth's crust how does it get into the air that we breath
lesya [120]
 <span>A small proportion of helium in the crust is helium that was trapped in the Earth when the Earth formed and has not yet escaped. Most helium on Earth, however, forms as a result of alpha decay of uranium and thorium. The emitted alpha particles, once they grab a couple of stray electrons, become helium atoms and can accumulate in gas reservoirs along with things such as methane.</span>
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3 years ago
List at least 15 important events in the science of Astronomy. Include a description of the event including the year and what cu
lbvjy [14]
The Big Bang probably occurred.
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7 0
3 years ago
Read 2 more answers
What are the names of the two magnetic poles?
gizmo_the_mogwai [7]

What are the names of the two magnetic poles?

Ur answer is

North and South

3 0
3 years ago
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At 850K, 65L of gas has a pressure of 450kPa. What is the volume (in liters) if the gas is cooled to 430K and the pressure decre
Novosadov [1.4K]

Answer:

V₂ =  45.53 L

Explanation:

Given data:

Initial temperature = 850 K

Initial volume = 65 L

Initial pressure = 450 KPa

Final temperature = 430 K

Final pressure = 325 KPa

Final volume = ?

Solution:

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 450 KPa× 65 L × 430 K / 850 K × 325KPa  

V₂ = 12577500 KPa .L. K / 276250 K. KPa

V₂ =  45.53 L

8 0
3 years ago
Determine the average atomic mass of the following mixture of isotopes of Potassium:
dexar [7]

Answer

the first one (im pretty sure)

Explanation:

5 0
3 years ago
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