What best defines an extensive property of a substance? a) a property that is observable b) a property that is measurable c) a physical property that depends on the sample size d) a physical property that is not dependent on sample size

C) a physical property that depends on the sample size correct answer.

Explanation:

extensive property of a substance is a physical property depend on sample size.

An extensive property of a substance depends on the amount of matter and the sample size, it can be measured without any chemical transformation occuring.

extensive properties change as the sample size change e.g. if amount of material is double then the mass will also get double and mass is an example of an extensive property.

Examples of extensive properties are volume, length, mass, weight, size, etc.

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.