To find the number of neutrons.....
NEUTRONS = MASS NUMBER - ATOMIC NUMBER ( PROTONS)
NEUTRONS = 19 - 9
So this element has 10 neutrons
Using natural gas is cheaper from other fossil fuels when used for personal needs. It also doesn't pollute the ground or the underground water.
I would say that this problem needs more information. Giving only the concentration would not specify anything since in general salts are neutral as they are from neutralization reactions. Specifying other properties of the compound would be more helpful.
Answer:
please where is the Gibb free energy to indicate if its exothermic or endothermic reaction but the chemical equation is homogeneous one.
Answer:
Water vapor retains the same heat energy.