The solvents are water (H2O) and hexane (CH/). Only water | hexane has polar bonds. Thus, water is the polar | nonpolar solvent, and hexane is the polar | nonpolar solvents

there is none because earth is stationary and flat.

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.

plasma - state of matter made up of electrically charged particles