What type of reaction is 2NaN3(s) +2Na(s) + 3N2(g)

Is this a single replacement reaction or there is no

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

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?