An aqueous glucose stream is to be catalytically hydrogenated to sorbitol in a slurry tank reactor. feeds to the reactor are an aqueous glucose stream with a concentration of 2.6 kg mol/m at a flow rate of 10-3 m/s and a 120 percent of stoichiometric hydrogen gas stream. the reactor is to be operated isothermally at 423 k, where the reaction is observed to follow the kinetics shown here: -rglucose = kchydrogen glucose k423 k = 3.76 x 10-4 (kg mol/m? ) -0.6s-1 the reaction is conducted at 10,000 kpa, the solubility of hydrogen may be assumed to be 5 kg mol/m at this pressure.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72

is there any options? maybe im just not seeing them but i need the options to

-love shrooms

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.