1according to the modern model of the atom, the nucleus of an atom is surrounded by one or more(1) electrons (3) positrons
(2) neutrons (4) protons

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

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?

What is the molar mass of a gas that has density of 2.054 g/l