Data for permeation of a gas species through a solid are often presented in terms of a socalled permeation constant k, which is defined as the product of the solubility constant and the diffusivity: k = bdab. it is commonly expressed as the amount of gas [cm3/s at stp (273k and 1 atm)] permeating through a 1 cm2 cross section of solid of 1 cm thickness, for a partial pressure difference of 1 atm. for hydrogen through pyrex glass at 1000 k, k = 1.2 x 10^-8 cm^2/s∙atm and dab = 2 x 10^-8 cm^2/s. find the solubility of hydrogen in glass, in mass fraction units (i. e., grams of h2 per gram of glass per atmosphere partial pressure). take the density of the glass to be 2.4 g/cm3.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

i think slash and