(Science)How does the heart keep the blood flowing throughout the body? It contracts and relaxes
It inflates and deflates
It inhales and exhales
It opens and closes

In an oxidation-reduction reaction, oxidation is what happens when a reactant

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

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?