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xz_007 [3.2K]
3 years ago
10

P

Chemistry
1 answer:
BARSIC [14]3 years ago
6 0

5.426 x 10^{22} molecules are there in a deep breath of air whose volume is 2. 35 L at body temperature 36 C and a pressure of 740 torr.

Explanation:

Data given:

volume V = 2.35 L

Temperature T = 36 Degrees or 273.15 + 36 = 309.15 K

pressure P = 740 torr OR 0.973 Atm

R = 0.08205 L atm / mole K

n (number of molecules of gas)= ?

The formula used will be

PV = nRT

Putting the value of given variables in above equation:

n = \frac{PV}{RT}

 = \frac{0.973 x 2.35}{0.08205 x 309.15}

 = 0.0901 moles

According to Avagadro' s law that gases at equal volume, temperature and pressure contains same molecules.

number of molecules:

number of moles x avagadro number

0.0901 x 6.02 x 10^{23}

= 0.54 x 10^{23}

= 5.426 x 10^{22} molecules.

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