Which of these diseases directly affect the respiratory system?flu and malaria, strep throat and hiv , diabetes and malaria, flu and hiv

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.