The average adult male can hold about 3 liters of air. how many moles of air can the lung hold at a pressure of 500 kpa and temperature of 310 k

0.58 moles

Explanation: Using ideal gas equation:  

PV = nRT

P= pressure =500 kPa=4.93 atm    [1 kPa= 0.009atm]

V= volume =3 L

n = no of moles = ?

R= gas constant =0.0821 Latm\molK

T= temperature = 310K

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: