A sealed 12 m3 tank is filled with 6000 moles of ideal oxygen gas (díatomic) at an initial temperature of 270 K. The gas is heated to a final temperature of 340 K. The atomic mass
of oxygen is 16.0 gmol. The mass density of the oxygen gas, in SI units, is closest to:

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?