Select the correct answer from each drop-down menu. Bailey is a crime scene investigator studying the blood spatter at a crime scene. Which three points of information does he first calculate using
the blood spatter?
Bailey notes that there are secondary spatters on only one side of the droplets, indicating the of the victim's injury. He
studies the length and width of stains to determine the , or how hard the victim was struck. Finally, he uses angles and
graphing techniques to determine the
of the blood, where the victim was injured

What order does these go in the blanks?
Origin, Direction, or Impact

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.

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b