The first order decomposition of N2O5 to form NO2 and O2, has k =
s^-1 at 70°C.
What % of the NO2 has decomposed after 278 s?​

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.