Which statement explains why a xenon atom is electrically neutral? 1.
The atom has fewer neutrons than electrons.
2.
The atom has more protons than electrons.
3.
The atom has the same number of neutrons and electrons.
4.
The atom has the same number of protons and electrons.

law of conservation of matter

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.