what is meant by the following question

give a detailed experiment design for the conversion of 2-methyl-2-butanol to 2-methyl-2-butene on the 0.2 molar scale.

I don't need help with the experimental design
I just didn't understand what is meant by 0.2 molar scale.

thanks!

I haven't heard of that expression either.

I can make an educated guess that the question wants you to write up a procedure for converting the one chemical to the other and use 0.2 molar materials at the start. That might not mean exactly 0.2 M but in that vicinity. For example if you know the percent yield, you might prepare 0.2 M product and use stoichiometry to give in your directions how much of the reactants to start with to make 0.2M products.