A student is trying to find the melting point of different salts. The student places each sample of salt in a thin tube. The student then heats
each tube
Which is most important to record during this experiment?
O A. the time it takes for the salt to change from a liquid to a gas
O B. the time it takes for the salt to change from a solid to a liquid
O c. the temperature at which the salt changes from a liquid to a gas
O D. the temperature at which the salt changes from a solid to a liquid
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What are the similarities of physical and chemical change ?
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If there are 3.5 moles of koh, how many moles of naoh can be produced? question 1 options: a)3.0 moles naoh b)3.5 moles naoh c)1 moles naoh d)9 moles naoh
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Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.
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