Which of the following is a measurement of an object's mass?
Group of answer choices

A. 10 centimeters

B.10 kilograms

C.10 newtons

B: Kilograms

Explanation:

Centimeters are used to measure length

Newtons are used to measure force

Kilograms measure weight or mass.

B. Kilograms

Explanation:

Centimeters are used to measure length, (they are on rulers)

Kilograms are used to measure weight or mass

Newtons are used to measure force (If you threw a baseball)

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.