What is really occurring when you feel "cold flowing into you" when you go outside on a cold winter day? a. cold is flowing into you from the air. b. heat is flowing into you from the air. c. cold is flowing into the air from you. d. heat is flowing into the air from you.

What’s the scientific notation for the number 6,840,000,000

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 do cells appear different in distilled water than they do in 10% salt water?