What is paper chromatography is and what it is used for? explain as simple as possible.

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Find the mass in grams of 1.37x1020 particles of h3po4

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.