Which statement describes one of the main differences between a physical and a chemical change? a chemical change involves reactants and products, whereas a physical change involves only reactants. a physical change is a change of state, whereas in a chemical change the substance keeps the same form. a physical change brings about a different form of the same substance, whereas a chemical change forms a different substance. a chemical change caused by adding or removing heat energy can usually be reversed, whereas a physical change can generally not be reversed.
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Chemistry, 22.06.2019 00:00
What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17
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Chemistry, 22.06.2019 02:00
For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition
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Chemistry, 22.06.2019 21:30
Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.
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Which statement describes one of the main differences between a physical and a chemical change? a c...
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