During the developing of a tlc plate, it is common to place a cover over the developing chamber and have a piece of moist filter paper line the walls of the tlc chamber. what is the purpose of the moist filter paper in the tlc chamber during a thin layer chromatography experiment?
a. to allow evaporation from the tlc plate during development
b. to ensure that the solvent level is always above the sample spots
c. to ensure that the air in the chamber is saturated with solvent vapor
d. to keep the solvent front 5 to 10 mm from the top of the plate

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.

do not use any of these common illegal characters/symbols:

# pound

% percent

& ampersand

{ left curly bracket

} right curly bracket

\ back slash

< left angle bracket

> right angle bracket

* asterisk

? question mark

/ forward slash

  blank spaces

$ dollar sign

! exclamation point

' single quotes

" double quotes

: colon

@ at sign

amazon is a website were you shop cosmetics such as clothes, electronics and food. amazon also makes there own thechnology such as kindle book readers and tablets or the alexa which is an inteligent ai. and they also have a streaming service which is called prime video.