Which is the correctly balanced chemical equation for the reaction of koh and h2so4?

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

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?