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.

What are the first three quantum numbers for the electrons located in subshell 2s?

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative