4568/1.3 HELP, I am in chemistry and I thought I was getting the right answer but every time I put it in, it's wrong

the solar system used to have much dust particles option no d

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

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you gotta add the following molecules so we can give u an answer

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