The weight of an object is the product of its mass, m , and the acceleration of gravity, g (where g=9.8 m/s 2 ). If an object’s mass is m=10. kg , what is its weight not in newtons.

98Kg.m/s2

Explanation:

The following data were obtained from the question:

g (Acceleration due to gravity) = 9.8m/s2

m (mass of object) = 10Kg

W (weight) =?

The weight and mass of an object are related by the following equation:

Weight = Mass x Acceleration due to gravity

W = m x g

W = 10Kg x 9.8m/s2

W = 98Kg.m/s2

Therefore, the weight of the object is 98Kg.m/s2

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.