Final Review
Quiz by Demetris Riddles
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40 questions
Show answers
- Q1Which characteristic distinguishes a molecule from an atom?Molecules are bonded togetherMolecules are the smallest unit of a pure substanceMolecules are positiveMolecules are composed of subatomic particles30s
- Q2The students mixed vinegar and baking soda and bubbles formed and producing a gas. If they measured the mass of the substance at the beginning and had 20g, what would be the mass after the chemical reaction?Less than they had initially because the gas left the flask similar to evaporationMore than they had initially because the gas would stay in the flask30s
- Q3Which of the following best describes a chemical change?Liquid EvaporatedLiquid remained clearBubbling and fizzing30s
- Q4Sarah has two glasses, filled with water and adds 1 ice cube to each glass. In the first glass, the ice cube sunk and in the second glass, floated. What best describes the conclusion?Higher densities will float on top of lower density solutionsLow densities will float on top of higher density solutions30s
- Q5You mix two solutions together and your left with a solid white substance after all the liquid is gone. What best describes the original substance?Mixture that went through a physical changeMixture that went through a chemical change30s