Answer:
It's a, trust me I'm very good with chemistry
Answer: (1)CaSO4 -> (2)O2 + (1)CaS
Explanation: edge 2020 chem
Answer:
Convex mirrors are more study than flat mirrors.
Explanation:
This is the correct answer because i have already studied this
use a mortar & pestle to grind the solute into smaller particles, thus increasing the surface area.