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Taya2010 [7]
3 years ago
11

A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.22 atm

and 0.35 atm, respectively. What is the partial pressure of the third gas, helium?
Group of answer choices

0.57 atm

0.68 atm

1.38 atm

1.82 atm
Chemistry
1 answer:
Lerok [7]3 years ago
3 0

Answer:

0.68 atm

Explanation:

am i right?

tell me in the comment if im right

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A 62.6-gram piece of heated limestone is placed into 75.0 grams of water at 23.1°C. The limestone and the water come to a final
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M₁ = mass of water = 75 g
T₁ = initial temperature of water = 23.1 °C
c₁ = specific heat of water = 4.186 J/g°C

m₂ = mass of limestone = 62.6 g
T₂ = initial temperature of limestone = ?
c₂ = specific heat of limestone = 0.921 J/g°C

T = equilibrium temperature = 51.9 °C
using conservation of heat
Heat lost by limestone = heat gained by water
m₂c₂(T₂ - T) = m₁c₁(T - T₁)
inserting the values
(62.6) (0.921) (T₂ - 51.9) = (75) (4.186) (51.9 - 23.1)
T₂ = 208.73 °C
in three significant figures
T₂ = 209 °C
7 0
3 years ago
how many valence electrons are found in most atoms of noble gases use this information to explain why the noble gases are unreac
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8 valence electrons are found in noble gases. Since noble gases have 8 valence electrons that means they have a full shell - which makes them unreactive
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