Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that a chemical change has occurred in the substance?
1) If the substance is a liquid or solid, an increase in temperature would indicate a chemical change.
2) If the substance is a liquid, a change of some of the liquid to gaseous form would indicate a chemical change.
3) If the substance is a solid, a change of some of the solid to liquid form would indicate a chemical change.
4) If the substance is a liquid or solid, the production of an odor would indicate a chemical change.
Answers: 3
Chemistry, 22.06.2019 08:00, PrincessKeliah5538
Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
Answers: 1
Chemistry, 23.06.2019 02:40, sherlock19
How can a mixture of salt water be separated into salt and water
Answers: 1
Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation wou...
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