A mixture of 3 samples namely; p-nitro phenol (A), p-amino phenol (B) and p-nitro anisole (C) were eluted onto TLC plate coated with silica gel SiO2 as a non polar surface applying DI H2O as a polar eluant. What will be spot color that matches each substance according to the attached TLC chromatograph below, knowing that the polarity order is B (most polar) > A (moderate polar) > C (least polar)?

Noble gases are the most reactive elements on the periodic table. a. true b. false

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?