What mass of carbon dioxide is produced when 5.60g of butane is burnt

What will most likely happen when two bromine atoms bond together?

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?

Consider the story you just read. all but one of the choices below indicate that something is living.