Some skin creams claim that they are "ph balanced" yet do not have a ph of 7. what do the manufacturers mean by "ph balanced"

pH balanced means it will not vary much.

Explanation:

The pH = 7 is for neutral substances.

If a substance is neutral, it does not means that the substance will have a balanced pH.

pH balanced means that the pH of the substance (cream) will not vary much or easily.

The pH of the cream will remain the same even after its application.

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.

d

explanation: