A sample of manganes reacts completely with oxygen in a specialized crucible. The reaction is given as: manganese + oxygen → mangenese oxide You are asked to determine the charge on manganese in the manganese oxide. Manganese can have many different charges as an ion: +3, +4, +5, +6, or +7. The data from your experiment is given below Mass of crucible Mass of crucible + manganese Mass of crucible + unknown manganese oxide 8.856 g 9.902 g 10.816 g Use the data provided to determine the charge on the manganese. Finally, write a balanced chemical equation for the reaction that occurs between manganese and oxygen in the crucible.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.