What is the Name of the Covalent Compound, Se3P4?

For example, the compound FeSO4 is called iron(II) sulfate, because it contains Fe2+.

Explanation:

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answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.