The reaction of Cr(CO)6 with Ph2P(CH2)4PP h2 leads to the formation of two products, Aand B. The 31P NMR spectrum of Ashows two signals (δ +46.0 and –16.9 ppm, relative integrals 1:1), while that of Bexhibits one signal (δ +46.2 ppm). The IR spectrum of A and Bare almost identical in the region 2200 –1900 cm–1, with bands at 2063, 1983, and 1937 cm–1. Suggest identities for Aand B.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

The element that has the greatest electronegativity is