Give an example of a reaction using a 2 carbon molecule that could be classified as both an addition and a reduction reaction - draw, name and explain.

State the formula for density in words and mathematical symbols

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

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