briefly explain the problem that will be created if you
(a) mark the origin line with a washable flet-tip markromatogram until after you discover that the solvent front has reached the top of the paper.
(a) mark the origin line with a washable flet-tip markromatogram until after you discover that the solvent front has reached the top of the paper.
1 answer
3 answers
1 answer
1 answer