This scientist proposed that space is like an ocean, particles are immersed in this ocean, and gained mass as they moved through it.
Charles Messier
Albert Einstein
Peter Higgs
Hendrik Casimir

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Why is permeable soil best for plants that need a lot of drainage?

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.