3. What does Hess's law make it possible for you to do? о
You can calculate the heat of reaction by using standard heats of formation.
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You can add AH for two or more thermochemical reactions to get the final heat of reaction.
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You can represent heats of fusion and solidification on a graph called a heating curve.
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You can determine the heat of vaporization if you know the heat of condensation.

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material

What are some natural processes that represent physical and chemical changes?