Chemistry, 05.05.2020 05:00, gabigraceberg
An electrolytic cell having 100% current efficiency, operates at a voltage of 1.9 V when the current is 2.0 kA. Its operating temperature is 86 C. The cell happens to be completely heat insulated: heat can only be removed by the flow of reactants and of products and by water flowing through a cooling system built into the cell. Both feed and cooling water enter the system at 25 C. The cooling water leaves at 80 C. The gases leave at 85 C. Assume that the enthalpy change owing to the reaction is independent of temperature (285.9 MJ per kilomole of water). 1. . "That is the feed water consumption rate? \Vhat is the hydrogen production rate in kg/hour? "That is the flow rate of the cooling water? . A consultant was called in._ and he improved catalysis in the anode reducing the operating voltage (at 2.0 kA) to 1.47.) V The cooling water can now be shut oiT. "That is the. new operating temperature?
Answers: 1
Chemistry, 22.06.2019 12:00, shifaxoxoxo
What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist
Answers: 2
Chemistry, 22.06.2019 18:00, kingamir
Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]
Answers: 1
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