During a landslide, many tons of rocks slide down a hill in a very short time. A landslide would LIKELY force animals living in the area to - * Captionless Image
moving to a new area
develop different types of diets
develop new adaptations
uncover (uncover) all buried plants (buried)

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.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

the atomic mass is the bottom number on the element.

-steel jelly

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .