Abrine is used to measure the absolute permeability of a core plug. the rock sample is 4 cm long and 3 cm 2 in cross section. the brine has a viscosity of 1.0 cp and is flowing a constant rate of 0.5 cm3/sec ( cube centimeter per second) under a 2.0 atm pressure differential.
calculate the absolute permeability.

Answer : The absolute permeability is, 0.111 darcys.

Explanation : Given,

Volumetric constant rate =

Cross section area =

Pressure = 2 atm

Viscosity = 1.0 cp

Length of rock = 4 cm

From the Darcy equation  we conclude that,

where,

A = cross section area

P = pressure

= viscosity

l = length of rock

Now put all the given values in the above formula, we get:

Therefore, the absolute permeability is, 0.111 darcys.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.