Why is the ozone layer vital to life on Earth? A) It causes clouds to
be created
B) It shields the Earth
from ultraviolet (UV)
rays from the sun C) It is made up of oxygen
D) Planes fly in the
ozone layer

b

Explanation:

your answers are a,b,,e and f

i hope this

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.