How many lone electrons are there on cl in scl2.

that's what i got you can count the number of atoms

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

a corroding iron, if that's one of your choices

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.