Substance x is a gas at room tempreture

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?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Which subshell is represented by the actinides family?