How you will make 10^-3 dilution of stock solution of nacl 0.1 g/ml?

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

What does a numerical subscript following an element in a chemical formula mean?

What is the significance sodium hydroxide and hydrochloric acid