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SpyIntel [72]
3 years ago
13

How does your pattern of breathing change when you exercise and then rest ?​

Chemistry
1 answer:
Paladinen [302]3 years ago
7 0

Your pattern of breathing increases, making it faster than usual, when you're exercising because you're pushing your body to work harder and speeding up your heart rate making you tired.

When you're resting your breathing pattern should be steady and normal since you aren't doing anything that requires lots of body work or something that would make you out of breath.

Hope this helps,

Davinia.

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The vapor pressure of pure benzene is 750.0 torr and the vapor pressure of toluene is 300.0 torr at a certain temperature. You m
kow [346]

Answer:

Mole fraction of benzene in pure solution is 0.4472

Explanation:

Vapor pressure of pure benzene= 750 torr

Vapor pressure of pure toulene= 300 torr

Mole fraction of benzene in vapor= 0.669

1/P=Xa/Pa+ Xb/Pb

Where

Xa = mole fraction of A in water

Xb = mole fraction of B in water

P= Total pressure

Pa= total vapor pressure of pure A

Pb = total vapor pressure of pure B

Xa+Xb=1

Let A be benzene and B be toulene

We have Xa=0.669 and Xb= 0.331

1/P= 0.669/750 + 0.331/300

1/P= 0.000892/torr + 0.001103/torr

1/P=0.001995/torr

P= 501.25torr

We have P= Pa+ Pb

Where Pa= XaPa0

And Pb=XbPb0

Where

Xa= mole fraction of A in solution

Xb= mole fraction of B in solution

Now, substitute the data into the formula

501.25torr=Xa750torr + (1- Xa) 300 torr

Xa450torr + 300torr

Xa(450torr)= 201.25torr

Xa= 0.4472

Therefore, mole fraction of benzene in pure solution is 0.4472

7 0
3 years ago
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