Which property or properties of gases accounts for the observation that cases1. gas particles have no volume. ii. gas particles exhibit elastic collisions. iii. gas particles are in constant random motion, iv. gas particles do not exert attractive or repulsive forces on one anothera. b.eland ivi onlyi and iic. i, ii, and iiid. iii and iv

it is II and III

Explanation:

because according to the kinetic theory gas particles are always in constant motion and they will not bond and will bounce off each other

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.