An element is dull, is poor conductor of heat and electricity and needs one electron to complete its valence shell (outermost energy level). This element most likely belongs to which of the following groups?

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?

Which sample at stp has the same number of atoms as 18 liters of ne at stp

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.