1.- Dada la ecuacion
4 FeS₂ + 110₂ - 2FeO3 +8 SO₂
¿Cuantas moles de Fe₂O3 se pueden producir de
1.00 mol de Fe S2?
¿Cuantos litios de O2 a TPN se requieren
reacciona con 4.5 moles de FeS2
​

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table