Chemistry, 24.09.2019 23:00 ForbesDrew
Air at 20°c blows over a hot steel (1 %c) plate75 by 50 cm and 2 cm thick maintained at 250°c. the convection heat transfer coefficient is 25 w/m2. °c. a 300 w is lost from the plate surface by radiation. calculate the inside plate temperature.
Answers: 3
Chemistry, 22.06.2019 12:10
If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?
Answers: 3
Chemistry, 22.06.2019 16:00
Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.
Answers: 3
Air at 20°c blows over a hot steel (1 %c) plate75 by 50 cm and 2 cm thick maintained at 250°c. the c...
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