2. a chunk of limestone, which is calcium carbonate, reacts with acid.
how might you increase the rate of this reaction?

Crush the limestone... it would give more area for the acid to react

Explanation:

when the limestone is crushed, irt will expose more surface area to the acid making the reaction go quicker.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.