C3h8 + 5o2 -> 3co2 + 4h2o
according to this equation, which ratio of oxygen to propane is correct?

1- 5 grams o2 / 1 gram c3h8
2- 5 moles o2 / 1 mole c3h8
3- 10 grams o2 / 11 grams c3h8
4- 10 moles o2 / 11 moles c3h8

Lithium diisopropylamide [(ch3)2ch]2nli, referred to as lda, enjoys many uses as a strong base in synthetic organic chemistry. it is customarily prepared by the reaction of diisopropylamine [(ch3)2ch]2nh with butyllithium. draw the products of the reactions in the appropriate boxes and select the acid, base, conjugate acid, and conjugate base. be sure to answer all parts.

Two things that biomedical has invented or innvated

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?