A student lights a candle and observes it burning. • Identify the type of change that occurs., The change is a chemical change., A student lights a candle and observes it burning.Describe the evidence that shows this type of change has occurred., The candle wax melts and burns, producing light, heat, and new substances. The wax also changes color and decreases in mass as it burns., Identify the number of atoms of each element in this chemical reaction and compare them to prove that no matter was lost or gained when the reactants changed into products., . Based on the above equation, is matter conserved during the reaction? Why?, Yes, matter is conserved. The number of each type of atom is the same before and after the reaction — atoms were rearranged, not created or destroyed., Explain why the products have different properties than the reactant., Hydrogen peroxide is a clear, reactive liquid, but it breaks down into water (a stable liquid) and oxygen (a colorless gas). These new substances have different properties, so a chemical change happened., Use math to determine whether atoms are conserved in this reaction.

Maitha (set 2)

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