5 Select the correct answer.
A sealed, flexible container held 250 mL of a substance. The volume of the container was then decreased to 100 mL without any matter
escaping. What must be true about the matter in the container before the container's volume was changed?
O A It would have kept its shape of transferred to another container.
its particles were held together tightly in a rigid structure.
OB.
О С.
It was all located at the bottom of the container.
OD.
its particles were in constant, rapid motion.

Explanation for basic character?

Why are people not able to scuba dive in the deep part of the ocean

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.