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mrs_skeptik [129]
3 years ago
5

When matter changes from a solid to liquid or from liquid to gas, what kind of change takes place?

Chemistry
1 answer:
nataly862011 [7]3 years ago
6 0

Answer :-

Physical change

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What is the total pressure in units of kPa in a 7.85 L container that contains 4.45 moles of N2 and 2.45 moles of O2 at a temper
IgorC [24]

Answer:

Total pressure = 22.15 atm

Explanation:

Given data:

Total pressure = ?

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Solution:

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PV = nRT

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Pressure of O₂:

PV = nRT

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P = 61.75 atm.L/7.85 L

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6 0
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On hot days, you may have noticed that potato chip bags seem to "inflate", even though they have not been opened. If I have a 25
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The new volume of the bag will be 789.5 mL.

<u>Explanation:</u>

As per the Charles law, at constant pressure the volume of the gas is directly related to its temperature in Kelvin (K). That is as the temperature increases, the gas expands and vice-versa.

$\frac{V1}{T1} = \frac{V2}{T2}\\

V1 = 250 ml

V2 = ?

T1 = 19° C

T2 = 60° C

Now we have to rewrite the equation to get the new volume as,

V2 = $\frac{V1T2}{T1}

    =$\frac{250\times60}{19}

<em>     </em>= 789.47 ≈ 789.5 ml.

So the new volume of the bag will be 789.5 mL.

7 0
3 years ago
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