Determine how many significant figures there are in each of the following measurements. 1. 3.055 cm 2. 0.000055 in 3. 100.0 mL 4. 100 mm 5. 40005 ft2 6. 0.00540 yd Help pleasseee

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.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence