Un muelle cuya constante elástica vale 150 N/m tiene una longitud de 35 cm cuando no se aplica ninguna fuerza sobre él. a)Calcula la fuerza que debe ejercerse sobre el muelle para que su longitud sea de 45 cm

Which of these best describes an ionic bond?

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.

Which of the following is most likely true about water in chemical solutions?