The statement labeled as (a) is the correct one on that list.
Every chemical reaction requires a reactant, also called a reagents.
The concentration as % by mass is calculated as below
mass of solute/mass of solvent x100
mass of solute(sugar) = 4g
mass of solvent(water) =46 g
= 4g/ 46 g x100 = 8.7%
Answer: I found the answer it is.
