Answer:
these two processes supply the electrons that are needed for the electron transport chain
Explanation:
Oxidative phosphorylation is the process in which electrons transfer from electron donors to electron acceptors (usually oxygen). These reactions are called redox reactions, and they provide energy used to form ATP.
Electron donors (NADH and FADH2) used in oxidative phosphorylation are produces in some of the catabolic biochemical processes, such as glycolysis, the citric acid cycle, and beta oxidation. The NADH and FADH2 are energy-rich molecules because each of them contains a pair of electrons thus having a high transfer potential. Because of that, oxidative phosphorylation could not happen without first obtaining electron donors in glycolysis and citric acid cycle.
Warm air masses naturally rise above cold air, due to density differences. As the air mass rises into regions of lower pressure, it expands and cools. As it cools, water vapor condenses and forms extensive cloud coverage. The first clouds to form along the sloping surface of the cold air are high cirrus, which thicken to cirrostratus and altostratus. Once the clouds have thickened to 2500 m from the earth's surface, rain can begin to fall from the heavy nimbostratus cloud.
Answer:
1. evaporation of ethanol
2. condensation of ethanol
Explanation:
The first and second process imply a change of phase, which is essentially a physical change because the matter change from liquid to gas and from gas to liquid respectively and it can ve reversed.
The options 3 to 6 are related to a chemical reaction because the outcomes of the process are different compounds than the ones we had at the beginning. The main reaction that implies process 3 to 6 is represented by:
C6H12O6 + impurities → 2 C2H5OH + 2 CO+ C
For option 5. burning of natural gas
, we have:
Natural gas(Mainly a mix of CH4 and C2H10) +O2→COn+H2O
Therefore, justo 1 and 2 are a physical change
The degree of unsaturation can be calculated as
#C + 1 - (#H + #halogens)/2 + #N/2 . .in you case that is
5 + 1 - (9/2) + 1/2 = 2
There are 2 degrees of unsaturation . . .two double bonds or one triple bond. A closed ring also counts as one degree of unsaturation.
HOPE THIS HELPED :)
