Which of the following have the greatest number of atoms? (1pt) A)5 moles of Sodium (Na)
B)5 moles of Phosphorus (P)
C)5 moles of Argon (Ar)
D)They all have the same number of atoms

confused

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the dissolution of polymer can be thermodynamically described in 2 steps.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.