Diiodine pentoxide (I2O5) is used in respirators to remove carbon monoxide (CO) from air according to the chemical equation: I2O5 (s) + 5 CO (g) --> I2 (s) + 5 CO2 (g) What mass of carbon monoxide could be removed from air by a respirator that contains 15.9 g of diiodine pentoxide? The molar mass of I2O5 is 333.8 g / mol.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

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.

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products