Carlotta makes a graphic organizer about the steps of the Sun’s hydrogen fusion process. She wants to add three labels. Label 1: is a reactant. Label 2: Energy is released. Label 3: Helium is produced.
What is the best placement of the labels?
A. Label 1 in region V. Label 2 in region X. Label 3 in region Z.
B. Label 1 in region W. Label 2 in region Y. Label 3 in region Z.
C. Label 1 in region W. Label 2 in region X. Label 3 in region Y.
D. Label 1 in region V. Label 2 in region Z. Label 3 in region Y.

When in doubt: pick C

Which best explains why an iceberg floats?

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.

What was bohr’s contribution to the planetary model