Gas burning in an engine is an example of a
chemical change
phase change <...
Chemistry, 03.02.2020 14:52, andygomez1312M
Gas burning in an engine is an example of a
chemical change
phase change
physical change
nuclear change
Answers: 1
Chemistry, 22.06.2019 07:30, SchoolFirst9811
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 Š½Š¾ reagent a 2. Š½, Š¾" thŠ¾ oh Š½Š¾Š½-Ń compound a. compound b. compound c .ch-Š¾h 1. reagent b "ŃŠ½Š¾ 2. reagent c Ńh oh compound e. compound d.
Answers: 2
Chemistry, 22.06.2019 12:30, AnastasiaJauregui
Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together
Answers: 1
Mathematics, 31.12.2020 19:50