You add 6.5 g of iron to 25.50 mL of water and observe that the volume of iron and water together
is 26.33 mL . Calculate the density of iron.
Express your answer to two significant figures
with the appropriate units.

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

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.

Why does asexual reproduction result in offspring with identicle genetic variation