Magnesium oxide is a compound of magnesium and oxygen. How do you know that it is a completely different substance from each of the two elements it is made up of?

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Magnesium oxide is a compound of magnesium and oxygen. How do you know that it is a completely different substance from each of the two elements it is made up of?

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Answer 1 · 2017-07-27T18:29:58

By interrogating its melting point, boiling point, composition, appearance, chemical reactivity..........

Explanation:

Magnesium is a silvery metal with a metal point of $650$ $""^@C$ , and an atomic mass of $24.32*g*mol^-1$ . Oxygen is a colourless, room termperature gas with a boiling point of $-182.3$ $""^@C$ , and a molecular mass of $32.00*g*mol^-1$ .

$MgO$ is a white, hygroscopic solid with a metal point of $2825$ $""^@C$ , and a formula mass of $40.31*g*mol^-1$ . The difference in physical AND chemical properties dictate a difference in chemical composition and formula.

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Magnesium oxide is a compound of magnesium and oxygen. How do you know that it is a completely different substance from each of the two elements it is made up of?

1 Answer

Explanation:

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