10. (05.05 MC)

Read the chemical equation.

Fe2O3 + CO → Fe + CO2

If 1.8 moles of Fe2O3 react with 2.7 moles of CO, how many moles of each product are formed? (3 points)

5.4 moles Fe and 1.8 moles CO2

2.7 moles Fe and 0.9 moles CO2

3.6 moles Fe and 5.4 moles CO2

1.8 moles Fe and 2.7 moles CO2

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because

How does the attraction between particles affect the ability of a solvent to dissolve in a substance