Atomic mass is defined by the weight of protons and electrons in an atom or the weight of protons and neutrons in an atom? you?

The weight between the protons and neutrons in an atom

Explanation:

The number of neutrons is weighted between all of the different isotopes of the particular element, and is added to the number of protons which results in the total atomic mass.

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.