A student was given a white powder and asked to to study the action of water on it one nest and address of water to this white powder is set into hard mass into about half an hour a what is a common name and chemical formula white powder be named it to uses
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The Powder is plaster of Paris .it is calcium sulphate hemihydrate.
CaSO4.1/2H2O
It is used in hospitals for fractured bones. it is used to make toys
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