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Chemistry, 21.06.2019 20:30
Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other
Answers: 2
Chemistry, 22.06.2019 07:00
The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?
Answers: 1
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.
Answers: 2
Mathematics, 04.11.2020 19:20
Chemistry, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Chemistry, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20
Mathematics, 04.11.2020 19:20