What is TRUE of a compound? Group of answer choices

It must have water as one of its components

It does not always retain the properties of the substances that make it up

It requires electrical energy to make

It requires heat energy to make

It does not always retain the properties of the substances that make it up

It requires heat energy to make

Explanation:

A compound is a chemical substance composed of two or more kinds of atoms or elements joined together in a definite grouping.

The properties of compounds are distinct from those of individual elements that are combined in its make up.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

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