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.

a. a clone will be physically identical to the original, but won’t be genetically identical

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explanation:

a polar bond is formed when electrons are shared unevenly between atoms

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.