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A mole is like a dozen - it is a number of something. You can have a dozen people (12 people), a dozen oranges and so on. A dozen is useful for big objects like oranges, but atoms and molecules a...

To form Al2O3 you need both Al and O2 (oxygen gas is a dimer):

Al + O2 -> Al2O3

But this equation is not balanced. To balance it, first equate the number of oxygen atoms:

Al + 3O2 ...

For an ionic substance to conduct electricity, its ions must be free to move. As such, it must be in a molten state or in solution. Solid ionic substances will not be able to conduct electricity.

Increased temperature will favour the backward (endothermic reaction.) Any change imposed on the system will be counteracted by a response which reverses the change, i.e. shift the equilibrium in the dire...

Add to the unknown solution dilute nitric acid, then add silver nitrate solution. If Chloride, bromide or iodide ions are present then a white, cream and yellow precipitate will form respectively of silve...