Two chemicals react in an endothermic reaction. What can be known about this reaction?
When vinegar and baking soda react, the mixture becomes cold to the touch and a gas and a new liquid substance are formed.
Which best describes what happens to the atoms in a chemical reaction?
What must occur in order for a chemical reaction to be specifically classified as endothermic instead of exothermic?
Which best explains why a firework being ignited is an example of an exothermic reaction and not an endothermic reaction?
When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium nitrate. Which substance represents the precipitate?
Which is evidence that a chemical reaction has likely occurred?
When baking soda and vinegar react, the surface bubbles. What does this most likely indicate?
Pedro wants to create a chemical reaction between oil and water. He adds oil to a beaker of water and notices that the liquids do not mix. He then shakes the beaker and the drops of oil become suspended through the water for a few moments before returning to their separate layers.
Which of these most likely represents a chemical change?
Which is an example of a chemical reaction?
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