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chemistry revision

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m heats a sample. He plots the temperature every minute. Use the graphs to decide whether the sample is a pure substance or a mixture of substances. Explain your decision. (2 marks)

its temperature stays the same until all the solid has melted,This shows that the sample is pure

True or false and fix the false\:A mixture is made up of different substances that are chemically joined together.

false , not chemically bonded

true or false and fix the false : You cannot change the amounts of substances in a mixture.

false,you can change

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