How many milliliters are in 8.12 moles of N2

1.2506 g/L is the density of N2

8.12 moles x 28g/mole = 227.36 g

227.36 g x L/1.2506 = 181.888 L (1000ml/L)= 181,888 ml

Non-metals usually need more than two electrons to attain the octet structure, its not chemically economical to lose three or more electrons and it is difficult to get metals that will donate three or more electrons, so non-metals share electrons in order to attain octet structure.