Parents can try but ultimately fail to try to control children inside of school grounds. Parents can but are not at all obligated to force their children to make friends. It's not D because again they are not at all obligated to do that in fact most parents do the opposite and keep their children away from children of different social backgrounds.
A vessel of volume 22.4l contains 2.0 mol hydrogen and 1.0 mol nitrogen at 273.15k. calculate (a) the mole fractions of each component, (b) their partial pressures.
