Amino acids are colourless and can be separated and identified by chromatography. -glass cover
beaker
chromatography
paper
solvent
What additional apparatus is required to identify the amino acids present in a mixture?
А
a locating agent
B
a ruler
с
a ruler and a locating agent
D
neither a ruler or a locating agent

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

How many moles are contained in 5.6 l of h2 at stp

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.