Answer:
Chlorophyll
Explanation:
chlo·ro·phyll
noun
a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.
Answer: density = m/volume
25g / 1.59 g /cm3
= 15.72 
Explanation: first you need tp look for the density of the acid
Answer: Decomposition reaction can be defined as the breaking down of a complex compound into simpler individual units.
Decomposition is the exact opposite of synthesis or combination reaction.
Explanation: Decomposition reaction can be described and expressed in the following generic reaction.
AB => A + B