what is the mass of an irregularly shaped object that has a density of 1.2600 g/ml and a volume of 8.500 ml

Mass = 10.71 g

Explanation:

Given data:

Density of object = 1.2600 g/ml

Volume of object = 8.500 ml

Mass of object = ?

Solution:

Formula:

Density = mass/ volume

by putting values,

1.2600 g/ml = mass/ 8.500 ml

Mass = 10.71 g

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

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.