Is the ink a pure substance or a mixture? how can you tell?

Since, when tested with paper chromatography, ink separates into its constituent pure substances, ink is a mixture.

Explanation:

Paper chromatography can be applied to ink to determine if it is a pure substance or a mixture of pure substances (in which two or more pure substances are combined).

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.