19)answer. Is B I just did USA TEST PREP Making a 50:50 solution of water and ethylene glycol for the antifreeze in your engine creates a significantly higher boiling point than
water alone. What else occurs?

B)
The vapor pressure of the solution is lowered.
The water particles will evaporate much faster.
The intermolecular attraction between water and ethylene glycol is

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.

An observation that requires measurement is called quantitative observable or qualitative

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false