PLZ HELP 40 POINTS PLEASE
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Chemistry, 22.06.2019 05:50
What happens when the temperature of a solution increases?
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Chemistry, 22.06.2019 06:00
According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead
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Chemistry, 22.06.2019 07:30
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.
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Chemistry, 22.06.2019 12:40
In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false
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Mathematics, 19.07.2019 02:30
English, 19.07.2019 02:30
English, 19.07.2019 02:30
History, 19.07.2019 02:30
Mathematics, 19.07.2019 02:30
History, 19.07.2019 02:30
Mathematics, 19.07.2019 02:30
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Health, 19.07.2019 02:30
Mathematics, 19.07.2019 02:30