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- Multiple ChoicePlease save your changes before editing any questions.What is a reactant?The starting substanceThe ending substance
- Multiple ChoicePlease save your changes before editing any questions.What is a product?The starting substanceThe ending substance
- Multiple ChoicePlease save your changes before editing any questions.Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).Hydrogen and Oxygenwater - Multiple ChoicePlease save your changes before editing any questions.Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).Hydrogen and oxygenwater - Multiple ChoicePlease save your changes before editing any questions.Angelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?yes, because the properties changed and a new substance was made.no, because the properties did not change. - Multiple ChoicePlease save your changes before editing any questions.Which of the following are NOT signs that a chemical reaction occured?the properties changedbubbles of gas formedcolor stays the samesmells different
- Multiple ChoicePlease save your changes before editing any questions.What is a precipitate?a change in colora change in temperaturea solid formeda gas formed
- Multiple ChoicePlease save your changes before editing any questions.Alex wants to mix two substances together and to find out if a chemical reaction happens. What should he do?test the solubility before and after mixingmeasure the volume before and after mixingmeasure the mass before and after mixingtest the density of the before substance but not the after substances.
- Multiple ChoicePlease save your changes before editing any questions.a student mixes apple juice, water, and cinnamon together. Did a chemical reaction occur?Yes, because the apple juice changed the color of the water.yes, because the temperature stayed the samno, because the properties stayed the same.yes, because dissolving is always a chemical reaction.
- Multiple ChoicePlease save your changes before editing any questions.Burning is always a chemical reaction.Truefalse
- Multiple ChoicePlease save your changes before editing any questions.Sandra was burning a vanilla candle. Was there a chemical reaction?no, because burning is never a chemical reaction.Yes, because the properties of the wick changed.yes, because heat was added.no, because the ash formed was a different substance.
- Multiple ChoicePlease save your changes before editing any questions.Which of the following is NOT a chemical reaction?burning a marshmallow in a campfire.a campfireacid rain turning a copper roof green.Dissolving red Koolaid in water.
- Multiple ChoicePlease save your changes before editing any questions.Which of the following is a chemical reaction?Burning bread in the toaster.melting wax in a microwave.dissolving salt in waterboiling water to make steam.